 "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
 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
 Huntsville Unit of Texas State Penitentiary, "The Walls" prison. Huntsville, Texas, December 20, 2009
 Walls Unit prison. Huntsville, Texas, December 29, 2011
 Old Administration Building of Walls Unit Prison. Huntsville, Texas, December 29, 2011
 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
 Walls Unit prison. Huntsville, Texas, February 23, 2008
 Model of Walls Unit of Texas State Penitentiary in Prison Museum. Huntsville, Texas, December 18, 2010
 Old Administration Building of Walls Unit Prison. Huntsville, Texas, March 23, 2008
 Memorial plaque of Texas Historical Commission in front of Walls Unit of TDCJ prison system. Huntsville, Texas, December 29, 2011
 Walls Unit of prison system, Main Building. Huntsville, Texas, March 23, 2008
 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
 Huntsville Unit of Texas State Penitentiary "The Walls". Huntsville, Texas, October 31, 2009
 Exterior of Prison Museum styled as a prison. Huntsville, Texas, December 18, 2010
 Christmas light decoration "Santa s Lane" in Central Park. College Station, Texas, December 29, 2009
 Steamboat Christmas light decoration on a pond in Central Park. College Station, Texas, December 29, 2009
 Texas Prison Rodeo exhibit in Prison Museum. Huntsville, Texas, December 18, 2010
 Brick walls of Koporye Fortress. Leningrad Region, Russia, February 9, 2013
 Christmas light tunnel decoration "Santa s Lane" in Central Park at rain. College Station, Texas, December 29, 2009
 Crumbling brick walls of Fort Pike on Road 90, Saint Tammany Parish. Louisiana, July 4, 2006
 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
 Model of old prison rodeo arena in Prison Museum. Huntsville, Texas, February 23, 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
 Old Sparky electric chair in Prison Museum. Huntsville, Texas, December 18, 2010
 Inmate crafts items in Prison Museum. Huntsville, Texas, December 18, 2010
 Inmate money printed by Texas Prison System in Prison Museum. Huntsville, Texas, February 23, 2008
 Interior of a shaft for a "disappearing" Moncrieff gun within the fort s underground galleries in the historical Coastal Fort "Reef". The large hole in the ceiling "Oculus" is not a window or a skylight, but a gun pit. The rough, stained concrete walls and heavy metal brackets on the walls are remnants of the lifting mechanism and the platforms where the gun crew would operate. Kronstadt, Russia, September 27, 2025
 Christmas decoration of a mall under Prudential Tower. Boston, Massachusetts, December 13, 2005
 Christmas decoration in Hamad International Airport. Doha, Qatar, December 30, 2015
 Brick cap (Hypholoma) mushrooms in Huntsville Park. Texas, December 28, 2013
 Steamboat Christmas light decoration in Central Park. College Station, Texas, December 17, 2008
 Mosaic on walls of Church of Savior on Blood. Saint Petersburg, Russia, June 25, 2009
 Decorated walls of Church of Savior on Blood. Saint Petersburg, Russia, June 25, 2009
 Brick cap (Hypholoma) mushrooms among pine needles in Huntsville Park. Texas, December 28, 2013
 Brick cap (Hypholoma) mushrooms on a base of a tree in Huntsville Park. Texas, December 28, 2013
 Mosaic paintings on walls of Church of Savior on Blood. Saint Petersburg, Russia, June 25, 2009
 Interior mosaics on walls of Church of Savior on Blood. Saint Petersburg, Russia, June 25, 2009
 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
 Washed out clay walls in Ain Mohamed Fort near Al Areesh Road north from Zubara. Northern Qatar, December 26, 2015
 Makeshift weapons in Prison Museum. Huntsville, Texas, February 23, 2008
 Stone walls in old fishing village (ghost town) of Al Ghariyah on north-eastern coast, Ash Shamal area. Qatar, December 19, 2015
 Death penalty protests on exhibit in Prison Museum. Huntsville, Texas, February 23, 2008
 Stone walls with windows in old fishing village (ghost town) of Al Ghariyah on north-eastern coast, Ash Shamal area. Qatar, December 19, 2015
 TDCJ Captain Joe Byrd (Peckerwood Hill) Prison Cemetery. Huntsville, Texas, February 21, 2008
 Walls of stone courtyard of State Mosque (Sheikh Imam Muhammad Ibn Abdul Wahhab Mosque). Doha, Qatar, December 3, 2014
 Top security Nafha Prison in Negev Desert north from Mitzpe Ramon, holds around 200 Palestinians sentenced for life, view from a bus on Road 40 (destination of half of the bus passengers going from Beer-Sheva). The Middle East, March 22, 2001
 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
 This view emphasizes the imposing nature of Hermann Castle while revealing the stark reality of the modern frontier. From this angle, the Tall Hermann Tower looms directly overhead, showcasing its 51-meter height and white-washed stone upper sections. The massive limestone walls of the fortress rise steeply from the riverbank, illustrating why this stronghold was the northernmost defensive point of Livonia. In the foreground, the Friendship Bridge is heavily fortified, contrasting sharply with the medieval architecture. Rows of concrete "dragon s teeth" (pyramidal anti-tank obstacles) and coils of razor wire block the roadway. These fortifications, installed by Estonia around 2024-2025, serve as a physical barrier against potential military threats and unauthorized vehicle crossings, marking the bridge s transformation from a trade route into a secure defensive line. A blue, black, and white flag flies from the castle wall, asserting Estonian sovereignty. Modern security cameras are mounted on the utility pole in the foreground, highlighting the intense monitoring of this border zone. Estonia, October 16, 2025
 Lake Raven in fog in Huntsville State Park. Texas, December 20, 2009
 Lake Raven in Huntsville State Park. Texas, December 20, 2009
 Red Cascade or Turkish Cascade in Catherine Park. The Red Cascade is a dam that regulates the water level between the Upper Ponds and the Great Pond. The two "towers" flanking the crossing are designed in the Gothic style, featuring red brick walls with white limestone details, pointed arches, and niche windows. It was built in the 1780s by the engineer Ivan Gerard, likely based on designs by the architect Vasily Neelov. Pushkin (former Tsarskoe Selo) near Saint Petersburg, Russia, October 10, 2025
 Lake Raven in mist in Huntsville State Park. Texas, December 20, 2009
 Town Theater at 1023 12th Street. Huntsville, Texas, December 20, 2009
 City walls. Novgorod, Russia, August 1, 2001
 Boat ramp in Lake Raven in Huntsville State Park. Texas, December 20, 2009
 Ruins of stone walls in Al Areesh. Northern Qatar, March 6, 2015
 Passage Mall, one of walls inside. Odessa, Ukraine, August 16, 2004
 Fortification walls on Vyborgskaya Street. Vyborg, Russia, June 21, 2014
 Walls of Koporye Fortress. Leningrad Region, Russia, February 9, 2013
 Towers and walls of Koporye Fortress. Leningrad Region, Russia, July 17, 2005
 Walls of Ivan Gorod Fortress. Leningrad Region, Russia, February 9, 2013
 Walls of Ivan Gorod Fortress. Leningrad Region, Russia, February 9, 2013
 Walls of amphitheatre in Katara Cultural Village at rain. Doha, Qatar, May 4, 2013
 Stone walls in Al Jumayliyah (Jamilla, Aljumileh). Western Qatar, February 13, 2015
 Walls of Old City above Zion Gate. Jerusalem, the Middle East, October 31, 2002
 Walls of Flour Mill at Morskaya Naberezhnaya. Vyborg, Russia, June 21, 2014
 Walls of Koporye Fortress in snow. Leningrad Region, Russia, February 9, 2013
 Walls of Flour Mill at Morskaya Naberezhnaya. Vyborg, Russia, September 14, 2013
 Crumbled stone walls in a village of Al Areesh (Arish). Northern Qatar, May 9, 2015
 Limestone walls of the canyon of Ein Bokek, near Dead Sea. The Middle East, September 18, 2001
 Walls of Frijoles Canyon in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Christmas decorations on Main Street in Calvert. Texas, December 13, 2009
 Boardwalk of Chinquapin Trail through Alligator Branch of Lake Raven in Huntsville State Park. Texas, December 20, 2009
 Graffiti art on walls of Goving House at 11 Krepostnaya Street. Vyborg, Russia, September 10, 2016
 Old city walls near Vosstaniya Street in Kronstadt. Saint Petersburg, Russia, July 24, 2012
 Stone walls in a village of Al Jumail (Jumayl) west of Ruwais. Northern Qatar, May 9, 2015
 Great Mosque, view from city walls. Akko, the Middle East, June 7, 2002
 Walls of Old City from Napoleone Bonaparte Street. Akko, the Middle East, June 7, 2002
 Mosaic walls of Church of Savior on Blood. Saint Petersburg, Russia, February 2, 2013
 Graffiti art on walls of Goving House at 11 Krepostnaya Street. Vyborg, Russia, August 12, 2012
 Clock Tower through walls of Mary and Olaf Cathedral. Vyborg, Russia, February 14, 2013
 Christmas parade on University Drive. College Station, Texas, December 6, 2009
 Brick red cap of some mature bolete mushroom at the base of a pine on Four Notch Loop Trail of Sam Houston National Forest near Huntsville. Texas, July 26, 2022
 Walls of Frijoles Canyon behind Visitor Center in Bandelier National Monument. New Mexico, near Los Alamos, May 26, 2008
 Clock Tower with walls of Mary and Olaf Cathedral in foreground. Vyborg, Russia, February 14, 2013
 Stone walls in a village of Al Jumail (Jumayl) west of Ruwais. Northern Qatar, January 24, 2015
 Stone walls remained from Al Mafjar village, northern area near Ruwais. Qatar, April 12, 2013
 Narva River from walls of Ivan Gorod Fortress. Leningrad Region, Russia, February 9, 2013
 Floodlines on a window and walls of a house at 6510 Canal Boulevard. New Orleans, Louisiana, March 10, 2006
 View of Zagorsk city from walls of monastery of Sergiev Posad near Moscow. Russia, August 29, 2001
 Remains of stone walls near Al Thugab Fort. North-west coast, Qatar, June 20, 2015
 Walls of Carnegie Mellon University in Education City campus at evening. Doha, Qatar, May 26, 2013
 Cobblestone walls at Ibn Al Khateeb Street, Fereej Abdel Aziz area. Doha, Qatar, May 24, 2013
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