 Ontika Limestone cliff with Kivisilla Falls near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Frozen Martsa Falls below Ontika Limestone cliff in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Valaste Falls and Ontika Limestone cliff in Ontika near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Ontika Limestone cliff above Karjaoru Falls near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Frozen Valaste Falls in Ontika near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Martsa waterfall on Ontika Limestone cliff near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Ontika Limestone cliff and a forest in Saka near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Ontika Limestone cliff and Gulf of Finland from observation platform in Saka near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 A trail below Ontika Limestone cliff along Gulf of Finland in Toyla - Oru Park in Kaasiku near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Frozen Martsa Falls in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Icy Martsa Falls in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Martsa Falls in winter in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Snow and ice of Martsa Falls in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Icecles of Martsa Falls in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Icy masses of Martsa Falls in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Forest along Gulf of Finland near Karjaoru Falls in Saka near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Winter view of Martsa Falls in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Martsa waterfall in Toyla - Oru Park near Kohtla-Jarve. Ida-Viru County, Estonia, February 10, 2018
 Guard towers of Viru Gate at Viru 26 in Tallinn old town. Estonia, August 14, 2024
 Intimo and Viru 17 shops in Tallinn old town. Estonia, August 14, 2024
 Frozen Taughannock Falls near Ithaca, view from upper falls overlook. New York, December 10, 2005
 Limestone rocks near the falls in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Stone hut nestling under a limestone cliff remained from television production in Ras Abrouq peninsula in west central coastal area, north from Zekreet. Qatar, February 13, 2010
 Frozen Taughannock Falls near Ithaca. New York, December 10, 2005
 Frozen Taughannock Falls, zoomed. Ithaca, New York, November 26, 2005
 Frozen Taughannock Falls near Ithaca, view from a bridge. New York, December 10, 2005
 Frozen Taughannock Falls, view from a bridge. Ithaca, New York, November 26, 2005
 Limestone cliff on Jebel Fuwairit. Qatar, October 3, 2014
 Frozen Buttermilk Falls on Mountain Road in Delaware Water Gap. New Jersey, March 3, 2007
 Limestone cliff at sunrise on Jebel Fuwairit. Qatar, October 3, 2014
 Limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Beebe Lake dam falls from Triphammer foot bridge, frozen. Ithaca, New York, November 26, 2005
 Overhanging limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 A small limestone cliff near Chalcolithic temple in Ein Gedi. The Middle East, January 24, 2002
 Mushroom-shaped limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Edge of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Broken limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Vegetation around a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Top section of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 View from a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Edge of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Mushroom shaped limestone cliff in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Sandy area below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Broken part of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 2016
 Plant of Agriophyllum minus in sand below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Frozen Ithaca Falls. Ithaca, New York, November 25, 2005
 Frozen Ithaca Falls. Ithaca, New York, December 9, 2005
 Plant of Agriophyllum minus in sandy area below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Plant of Agriophyllum minus in windblown sand below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Tribulus macropterus var. arabicus in sandy area below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Blooming Tribulus macropterus var. arabicus in sandy area below a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Cracked limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Various crustose lichens on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Black limestone rocks in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Lichens and sorrel on shady limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Leather lichen (Dermatocarpon) on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Black lichen Verrucaria on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Buellia and other lichens on a limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Grey crustose lichen on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Crustose lichens of different colors on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Leather lichen (Dermatocarpon) on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Button lichen (Buellia) on a limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Brown and orange crustose lichens on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Leather lichen (Dermatocarpon) on limestone in a forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Dark-green crustose lichen on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Button lichen (Buellia) on a limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Button lichen (Buellia) on limestone near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Tar-jelly lichen (Collema) on limestone conglomerate in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Smooth limestone rocks near the water stream in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Some whitish lichen on a limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Button lichen (Buellia) on limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Dust lichen (Lepraria) on limestone in shade of cliffs in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Ruffle lichen (Parmotrema) on a mossy limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Green Cladonia lichen on sandstone or limestone in a forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Close up of black and green lichen Verrucaria on limestone in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 White patch of Aspicilia lichen on a limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Button lichen (Buellia) on a mossy limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Patches of button lichen (Buellia) on a limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Ruffle lichen (Parmotrema) in shade on a mossy limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Rock shield lichen (Xanthoparmelia) on limestone in a red cedar forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Close up of green Cladonia lichen on sandstone or limestone in a forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Some dark-green crustose lichen on a limestone rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Ruffle lichen (Parmotrema) on a mossy limestone rock in a red cedar forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Blunt pellitory (Parietaria pensylvanica, Urticaceae) in shade of limestone cliffs in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Port Sullivan Church at County Road 262, Milam County. Texas, July 24, 2022
 Bordered scale lichen (Psora pseudorussellii) on a limestone conglomerate rock near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Limestone cave with a spring of a tributary of Lampasas River near the entrance of Chalk Ridge Falls Park, below a dam of Stillhouse Hollow Lake. Belton - Killeen, Texas, August 17, 2008
 Rock shield lichen (Xanthoparmelia)(?) on a limestone rock in a forest in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Rock shield lichen (Xanthoparmelia) on a mossy limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Unicorn plant (devil s claw, Proboscidea loisianica) on roadside of County Road 264 in Branchville, Milam County. Texas, July 24, 2022
 Chiseled sunken disk lichen (Circinaria contorta, Aspicilia contorta) on limestone near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Firedot lichen Caloplaca subsoluta (Squamulea subsoluta, Caloplaca irrubescens) on limestone near the river in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Tippecanoe County Amphitheater near Battle Ground, Indiana, February 14, 1998.
 A village and frozen Slocums River at the end of Gaffney Road. Dartmouth, Massachusetts, February 8, 2004
 Frozen quahog shells on Horseneck Beach at sunset. Westport, Massachusetts, February 1, 2004
 A shell of quahog frozen into Horseneck Beach at sunset. Westport, Massachusetts, February 1, 2004
 A village and frozen Slocum River at the end of Gaffney Road. Dartmouth, Massachusetts, February 8, 2004
 Frozen bay from Fort Hancock Historic District. Sandy Hook, New Jersey, February 11, 2007
 Boats and frozen Slocum s River at the end of Gaffney Road. Dartmouth, Massachusetts, February 8, 2004
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