 Walls Unit of prison system, main entrance. Huntsville, Texas, June 29, 2008
 Model of Walls Unit in Prison Museum, with Main Building in the center, Infirmary to the left and Dining to the right. Huntsville, Texas, February 23, 2008
 Old Administration Building of Walls Unit Prison. Huntsville, Texas, March 23, 2008
 Huntsville Unit of Texas State Penitentiary "The Walls" (established 1849) at morning. A clock above the main entrance to the prison is a symbol of time which serves as a reminder to those inside. Huntsville, Texas, December 18, 2008
 Memorial plaque of Texas Historical Commission in front of 32 feet high and 2-3 feet thick brick security wall (1942) surrounding Walls Unit of TDCJ prison system. Huntsville, Texas, June 29, 2008
 Memorial plaque of Texas Historical Commission in front of Walls Unit of TDCJ prison system. Huntsville, Texas, December 29, 2011
 Old Administration Building of Walls Unit Prison. Huntsville, Texas, December 29, 2011
 Walls Unit prison. Huntsville, Texas, February 23, 2008
 Inmate money printed by Texas Prison System in Prison Museum. Huntsville, Texas, February 23, 2008
 "Merry Christmas to All" decoration on the 32 feet tall brick security wall surrounding "The Walls" prison (Huntsville TDCJ Unit), with a memorial historical plaque in foreground. Huntsville, Texas, December 18, 2008
 Christmas decoration on tall brick security walls of Huntsville prison "The Walls". Huntsville, Texas, December 20, 2009
 Walls Unit prison. Huntsville, Texas, December 29, 2011
 Huntsville Unit of Texas State Penitentiary, "The Walls" prison. Huntsville, Texas, December 20, 2009
 Model of Walls Unit of Texas State Penitentiary in Prison Museum. Huntsville, Texas, December 18, 2010
 Model of old prison rodeo arena in Prison Museum. Huntsville, Texas, February 23, 2008
 Exterior of Prison Museum styled as a prison. Huntsville, Texas, December 18, 2010
 Makeshift weapons in Prison Museum. Huntsville, Texas, February 23, 2008
 Death penalty protests on exhibit in Prison Museum. Huntsville, Texas, February 23, 2008
 TDCJ Captain Joe Byrd (Peckerwood Hill) Prison Cemetery. Huntsville, Texas, February 21, 2008
 Ruins of Cuzzeri Building at 619 Main Street, at evening. Calvert, Texas, February 10, 2008
 Huntsville Unit of Texas State Penitentiary "The Walls". Huntsville, Texas, October 31, 2009
 Texas Prison Rodeo exhibit in Prison Museum. Huntsville, Texas, December 18, 2010
 Paper items with handles made by prisoners from Christian counseling literature and used as dumbbells in Prison Museum. Huntsville, Texas, February 23, 2008
 Syringe used to administer sodium thiopental to sedate inmates during first stage of lethal injection in Prison Museum. Huntsville, Texas, February 23, 2008
 Old Sparky electric chair used for capital punishment of several hundred death row inmates in 1924-1964 in Prison Museum. Huntsville, Texas, February 23, 2008
 Cuzzeri Building at 619 Main Street, a corner of Hanna Street. Calvert, Texas, December 27, 2008
 Irrigation pipe system on a field near Road 50, view from CR 443 north from Independence. Texas, September 21, 2008
 Irrigation pipe system on a field near Road 50, view from CR 443 north from Independence. Texas, June 1, 2008
 Irrigation system on agricultural field near Road 50, view from CR 443 north from Independence. Texas, June 1, 2008
 Water sprinkling by irrigation system over an agricaltural field near Road 50, view from CR 443 north from Independence. Texas, July 12, 2008
 Used electric chair in Prison Museum. Huntsville, Texas, December 18, 2010
 Death row exhibit in Prison Museum. Huntsville, Texas, December 18, 2010
 Recreation exhibit in Prison Museum. Huntsville, Texas, December 18, 2010
 Inmate crafts exhibit in Prison Museum. Huntsville, Texas, December 18, 2010
 Inmate crafts items in Prison Museum. Huntsville, Texas, December 18, 2010
 Old Sparky electric chair in Prison Museum. Huntsville, Texas, December 18, 2010
 Accumulation of beetles on walls of old building in Ras Abrouq peninsula in west central coastal area, north from Zekreet. Qatar, November 14, 2014
 Hutchings - Sealy Building (c. 1895) at a corner of Strand Avenue. Galveston, Texas, March 2, 2008
 A striking architectural contrast on Sauna Street (Sauna ta"nav), near the intersection with Va"ike-Karja Street. On the left, a modern glass-and-steel building features large display windows and industrial-style staircases, illuminated by neon lights. This building is part of the Helios Hall complex (formerly the Helios Cinema), which has been repurposed as an event venue and art space. The transparent facade allows a view into the contemporary interior, contrasting sharply with the solid, historic walls of the Old Town. On the right, the corner of an older, plastered building (Sauna 12) is covered in colorful, abstract graffiti. This gritty, urban element acts as a foil to the clean lines and slick surfaces of the modern building opposite it, highlighting the eclectic mix of styles in this part of the city. Tallinn, Estonia, October 16, 2025
 Scattered, moss-covered remains of the pontoon bridge mechanism or its anchoring system. The massive granite boulders with embedded iron loops are likely anchors for a floating structure, or remnants of the pontoon system itself that was once used or stored near the Visconti Bridge. Before the stone Visconti Bridge was built in 1803, a floating bridge existed in this location. It is possible these are historical remnants from that era or parts of the hydraulic system used to manage the floating pontoons or secure boats near the dam. Pavlovsk, a suburb of Saint Petersburg, Russia, October 6, 2025
 Trueheart-Adriance building (1882) at 210 Kempner Street in Strand District. Galveston, Texas, March 2, 2008
 Nafha Prison (Israeli top security prison, holds 200 Palestinians sentenced to life), view from a road to Eilat. North from Mitzpe Ramon, the Middle East, February 1, 2001
 Main University Building on Senate Square. Helsinki, Finland, July 18, 2015
 Perrin Building (built in 1877) at 330 Main Street. Lafayette IN, January 18, 1998.
 Jacques Adoue Building (1884) at 506 Main Street. Calvert, Texas, December 25, 2009
 Jacques Adoue Building (1884) at 506 Main Street. Calvert, Texas, December 27, 2011
 Sewer force-main vent with a flood-sealing check valve: under normal operation it releases trapped air and gases from the pressurized wastewater line. During flooding, the valve closes to keep water and debris out of the sewer system. Lick Creek Park. College Station, Texas, February 16, 2026
 Main building entrance facade of Museum of Islamic Art at evening. Doha, Qatar, January 30, 2010
 Main building of Forestry University in Lesnoy Park (Lesotekhnicheskiy Universitet). Saint Petersburg, Russia, July 30, 2017
 Historic Casimir Drugstore building (1869) (now Starr Studios) at 512 South Main Street. Calvert, Texas, December 13, 2025
 Walls of Frijoles Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Hutchings - Sealy Building (c. 1895) at 2326-28 Strand Avenue, a corner of Mitchell Avenue. Galveston, Texas, March 2, 2008
 Ruins of Hancock Bank and another building at North Beach Boulevard, near Main Street. Bay Saint Louis, Mississippi, February 4, 2006
 Downtown Lafayette. Carnahan-Ross-Kaplan Building at 622 Main Street (built in 1862) is to the left. Indiana, January 18, 1998.
 Ornamental vase in front of the main building in Lesnoy Park (Lesotekhnicheskiy Universitet). Saint Petersburg, Russia, July 30, 2017
 Mitchell Physics Buildings under construction on campus of Texas A and M University, view from Chemical Engineering building. College Station, Texas, March 18, 2008
 Herbarium, library, and botany lab building near main entrance of Botanic Gardens of Komarov Botanical Institute. Saint Petersburg, Russia, May 29, 2009
 New Main Drive and Administration Building on campus of Texas A and M University. College Station, Texas, November 25, 2017
 New Main Drive and Administration Building on campus of Texas A and M University. College Station, Texas, February 16, 2021
 Cuzzeri Building at 619 Main Street, a corner of Hanna Street. Calvert, Texas, December 6, 2012
 Walls of Frijoles Canyon behind Visitor Center in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Walls of Frijoles Canyon behind Visitor Center in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 New Main Road and Administration Building on campus of Texas A and M University at rain. College Station, Texas, December 30, 2009
 Cuzzeri Building (ca. 1880) at 619 Main Street, a corner of Hanna Street. Calvert, Texas, December 22, 2011
 Cuzzeri Building (ca. 1880) at 619 Main Street, a corner of Hanna Street. Calvert, Texas, December 22, 2010
 Cuzzeri Building (ca. 1880) at 619 Main Street, a corner of Hanna Street. Calvert, Texas, November 25, 2011
 Cuzzeri Building (ca. 1880) at 619 Main Street, a corner of Hanna Street. Calvert, Texas, December 13, 2009
 Vana Turg (Old Market) square, dominated by the Peppersack restaurant building. The central white building with the high gable and hoist beam is Peppersack (Viru 2 / Vana turg 6). Dating back to 1370, this historic structure was originally a merchant s house and granary. The name "Peppersack" refers to a nickname given to wealthy merchants (who traded in expensive spices like pepper) or possibly a specific owner, Hans Peppersack. Today, it is a popular medieval-themed restaurant known for its sword-fighting shows and hearty Estonian cuisine. To the right of Peppersack is the Art Nouveau building housing Scheeli Restaurant (Vana turg 2). Known for its elegant interior and romantic atmosphere, it offers a contrast to the rustic medieval style of its neighbor, serving refined European cuisine in a setting that recalls the 1920s. The square features a stunning ensemble of Gothic and Art Nouveau architecture. The Peppersack building retains its medieval pulley system (visible on the facade), which was used to hoist goods into the storage floors. The red sack hanging from the facade is a playful nod to the building s name. This spot is a major intersection in the Old Town, where Viru Street meets the Old Market, just steps away from the Town Hall Square. Tallinn, Estonia, October 16, 2025
 Close-up view of the Karasta River cascade in Oranienbaum Park. The water tumbles over tiered, man-made steps (part of the Lower Bridge dam system), transforming into a silky, smooth sheet of water that suggests a long-exposure photograph. Moss-covered boulders at the base add a rugged, naturalistic touch, breaking the uniform flow into frothy white streams that contrast with the dark, wet stone walls. Oranienbaum palace-and-park ensemble in Lomonosov (a suburb of St. Petersburg), Russia, October 13, 2025
 An old transformer substation (or similar utility building) in Lanskoy Garden on Sampsonievsky Prospekt near Lanskaya train Station. Its brick walls have effectively become an unofficial community billboard, covered in layers of concert posters (e.g., for the singer Linda). Saint Petersburg, Russia, October 9, 2025
 Main Street in downtown. Calvert, Texas, February 10, 2008
 Near Main Street in downtown. Calvert, Texas, February 10, 2008
 Tourist shops on Main Street. Calvert, Texas, February 10, 2008
 Old Mercury car near South Main Street. Anderson, Texas, January 26, 2008
 Corner of Preston and Main streets. Houston, Texas, January 21, 2008
 Main Street in downtown at rain. Houston, Texas, January 21, 2008
 Model of a train on Main Street in downtown Bryan. Texas, November 18, 2008
 Palace Theater on Main Street in downtown Bryan. Texas, November 18, 2008
 Mud Creek Pottery on South Main Street. Calvert, Texas, January 19, 2008
 Interior of Salazar s Garage at 717 Main Street. Calvert, Texas, January 19, 2008
 Vintage Edsel car near South Main Street. Anderson, Texas, January 26, 2008
 Salazar s Garage at 717 Main Street at evening. Calvert, Texas, February 10, 2008
 A white vintage stove in a distinctive blue building of Company B, a shop specializing in antiques, vintage-inspired gifts, and home decor at 506 South Main Street. Calvert, Texas, December 13, 2025
 Masonic Hall (McRary-Drury Building, Pierce Masonic Lodge No. 144) at 410 Main Street, a corner of East Mitchell Street. Calvert, Texas, December 22, 2011
 Masonic Hall (McRary-Drury Building, Pierce Masonic Lodge No. 144) at 410 Main Street, a corner of East Mitchell Street. Calvert, Texas, December 13, 2009
 Masonic Hall (McRary-Drury Building, Pierce Masonic Lodge No. 144) at 410 Main Street, a corner of East Mitchell Street. Calvert, Texas, December 27, 2011
 Masonic Hall (McRary-Drury Building, Pierce Masonic Lodge No. 144) at 410 Main Street, a corner of East Mitchell Street. Calvert, Texas, November 25, 2011
 Carnegie public library on Main Street in downtown. Bryan, Texas, October 9, 2008
 Queen movie theater on Main Street in downtown Bryan. Texas, November 18, 2008
 Queen movie theater on Main Street in downtown. Bryan, Texas, October 9, 2008
 San Fernando Cathedral, view from West Main Plaza. San Antonio, Texas, February 9, 2008
 Confederate Memorial on South Main Street in downtown. Anderson, Texas, January 26, 2008
 Evening view of Lai Street (looking towards St. Olaf s Church). The large grey building on the right (Lai 44/46) stands out with its curved bay windows and decorative facade elements. This is a fine example of Jugendstil (Art Nouveau) architecture, which appeared in Tallinn during the early 20th century. Its smoother lines and larger windows contrast sharply with the smaller medieval merchant houses nearby. On the left, the yellow building (Lai 33) retains a more traditional, modest scale typical of the street s residential past. At the end of the street, the illuminated white tower of St. Olaf s Church (Lai 50) acts as a dramatic focal point. The lighting accentuates the church s massive walls and the green copper spire against the twilight sky. Tallinn, Estonia, October 16, 2025
 Grand Menshikov Palace (Bolshoy Menshikovsky Dvorets). It is the palace s majestic Northern Facade, designed in the Petrine Baroque style by architects Giovanni Mario Fontana and Gottfried Scha"del between 1710 and 1727. The palace sits atop a natural ridge, enhancing its monumentality. A grand system of stone terraces and a double-flight staircase descends from the main entrance to the Lower Garden. Oranienbaum palace-and-park ensemble in Lomonosov (a suburb of St. Petersburg), Russia, October 13, 2025
 Vintage Edsel car and Courthouse on South Main Street in background. Anderson, Texas, January 26, 2008
 Islamic Da wah Center and trolley tracks on Main Street in downtown. Houston, Texas, January 21, 2008
 Entrance of Queen movie theater on Main Street in downtown Bryan. Texas, November 18, 2008
 Historic Old First National Bank building (1887), former CocoaModa, a high-end chocolate shop and bakery run by chef Ken Wilkinson, and now Vintage Treasures, an antique and collectibles shop, located at 518 South Main Street. Calvert, Texas, December 13, 2025
 Boletus mushroom on Four Notch Main Trail in Sam Houston National Forest. Huntsville, Texas, October 7, 2007
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