 Irregularly shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Bone-shaped limestone formations along a passage of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Drapery and ripple-shaped patterns of travertine flowstone speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Narrow passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 A column and other speleothems in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Limestone tunnel in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Flowstone feature in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Limestone formations in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Travertine speleothems along a passage in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Stalactites and massive stalagmites in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Lions Tails hanging in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Massive stalagmites in Hall of Giants of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Columns in a small side alcove in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Stalactites and stalagmites in a small alcove along the side of Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Huge stalagmite named "Rock of Ages" in Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 A narrow stalagmite with a large cluster of stalactites in the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 Speleothems (including stalactites, stalagmites, a column, and helictites) in an alcove of the Big Room of Carlsbad Caverns. New Mexico, December 26, 2007
 "Natural entrance" to Carlsbad Caverns. New Mexico, December 26, 2007
 Pointed formations in caves of Carlsbad Caverns. New Mexico, December 26, 2007
 Serpentine path of "Natural entrance" to Carlsbad Caverns. New Mexico, December 26, 2007
 Plants in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Ocotillo bush near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Fresh snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Agaves and cacti in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Cholla cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Prickly pears cactus in snow near a road between White s City and Carlsbad Caverns. New Mexico, December 26, 2007
 Irregularly shaped beach rocks in Al Aaliya Island (Jazirat al Aliyah). Qatar, March 27, 2013
 Irregularly shaped desert truffles (faqah) in Omani Market. Doha, Qatar, February 17, 2012
 Irregularly shaped pores of pineapple bolete mushroom (Boletellus ananas) on Caney Creek section of Lone Star Hiking Trail in Sam Houston National Forest near Huntsville, Texas, July 7, 2018
 George Ashby s Phillips 66 gas station at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Jackie and Hall Olds (Hal Old) store, grocery and cafe at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 A sign near Orla grocery near historical marker No. 3876 at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Orla cafe served to feed workers in oil, gas, and sulphur fields, at crossing of Hwy 285 and FM 652. Orla, New Mexico, December 25, 2007
 Stalagmites in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 A cave in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Stalactites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Stalagmites in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 A hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 The Watchtower in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Pluto s Anteroom(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 The King s Throne in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Spacious hall in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 Hall of the Mountain King(?) in Northern Cavern in Natural Bridge Caverns. San Antonio, Texas, October 6, 2007
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 - Pecos Wilderness in New Mexico 8/30/97 (Dallas - a trip to New Mexico mountains, July 11 - August 30, 1997)
 Passages of Yu. B. Bak House at Kirochnaya Street. Saint Petersburg, Russia, November 5, 2016
 Glass passages and 5-storey window of Museum of Islamic Art. Doha, Qatar, February 11, 2011
 Glass passages and 5-storey window of Museum of Islamic Art at evening. Doha, Qatar, February 11, 2011
 Passages of King s(?) Tower in Shlisselburg Fortress. Orekhovy Island, Leningradskaya Region, Russia, July 27, 2012
 A room in Museum of Fine Arts. Houston, Texas, June 17, 2007
 Billiards room in Yusupov Palace. Saint Petersburg, Russia, September 6, 2007
 Precious Room of Yusupov Palace. Saint Petersburg, Russia, September 6, 2007
 Red room in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Statue in Precious Room of Yusupov Palace. Saint Petersburg, Russia, September 6, 2007
 Room in Pavlovsky Palace. Pavlovsk, a suburb of Saint Petersburg, Russia, August 29, 2007
 Mirror in Precious Room of Yusupov Palace. Saint Petersburg, Russia, September 6, 2007
 A room in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Gold Drawing-room in Hermitage museum. Saint Petersburg, Russia, August 14, 2007
 Entrance of Majolica Room in Hermitage museum. Saint Petersburg, Russia, August 14, 2007
 Skeletal remains of a pier that used to hold Balinese Room, a nightclub and a former dancing hall and an illegal casino at 2108 Seawall Boulevard that extended 600 feet from Seawall Boulevard at 21st Street into the Gulf of Mexico and that was washed away by hurricane Ike. Galveston, Texas, November 15, 2008
 Living room in Pavlovsky Palace. Pavlovsk, a suburb of Saint Petersburg, Russia, August 29, 2007
 Room corner in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Red living room in Pavlovsky Palace. Pavlovsk, a suburb of Saint Petersburg, Russia, August 29, 2007
 Dining room in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Decorated room in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Room with portraits in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Green room in Grand Palace. Peterhof, a suburb of Saint Petersburg, Russia, August 31, 2007
 Entrance of Tukish Room from Mauritanian Parlor in Yusupov Palace. Saint Petersburg, Russia, September 6, 2007
 Room in Alexander Palace. Tsarskoe Selo (Pushkin), suburb of Saint Petersburg, Russia, September 2, 2007
 Reading room in Alexander Palace. Tsarskoe Selo (Pushkin), suburb of Saint Petersburg, Russia, September 2, 2007
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) shaped like pointed eggs on a birch tree near Lisiy Nos, west from Saint Petersburg, Russia, August 23, 2016
 Reconstruction of Soviet style boiler-room (kotelnaya) in Museum of Political History (Kshesinskaya Mansion). Saint Petersburg, Russia, August 25, 2007
 Syrian mesquite (Prosopis farcta) with irregularly swollen pods taken from Rawdat Al Faras Research Station (RAFRS, or Qatar University Farm) near Al Zubara Road. Qatar, May 29, 2015
 Rounded building of Education City Mosque. Doha, Qatar, June 29, 2016
 Dry pear-shaped puffball mushrooms (Lycoperdon pyriforme) in Huntsville Park. Texas, December 28, 2013
 Shell shaped tomb of Johnnie at Rice Cemetery at Road 241 near Cameron. Texas, December 1, 2012
 Dry brown pear-shaped puffball mushrooms (Lycoperdon pyriforme) in Huntsville Park. Texas, December 28, 2013
 Mature pear-shaped puffball mushrooms (Lycoperdon pyriforme) in Huntsville Park. Texas, December 28, 2013
 Marble tombstone shaped as a tree trunk in Bryant Station Cemetery near Buckholts. Texas, December 1, 2012
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) on an oak log in Huntsville State Park. Texas, December 18, 2020
 Rounded building of Education City Mosque from the ground floor. Doha, Qatar, June 29, 2016
 Old pear-shaped puffball mushrooms (Lycoperdon pyriforme) in Sosnovka Park. Saint Petersburg, Russia, December 31, 2016
 Billiard Room (Turkish Room) of Yusupov Palace. Saint Petersburg, Russia, July 8, 2009
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) on rotting oak wood in Huntsville State Park. Texas, December 18, 2020
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) on Kiwanis Nature Trail. College Station, Texas, December 25, 2017
 Rounded building with geometric patterns of Education City Mosque from the ground floor. Doha, Qatar, June 29, 2016
 Acalypha wilkesiana plant with reddish leaves shaped as a tree in Al Shamal City Park. Ruwais, Northern Qatar, December 19, 2015
 Close up of pear-shaped puffball mushrooms (Lycoperdon pyriforme) on Kiwanis Nature Trail. College Station, Texas, December 20, 2017
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) on rotten wood on Kiwanis Nature Trail. College Station, Texas, December 20, 2017
 Pear-shaped puffball mushrooms (Lycoperdon pyriforme) on a fallen tree on Kiwanis Nature Trail. College Station, Texas, December 20, 2017
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