 Ontika Limestone cliff with Kivisilla Falls 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
 Frozen Kivisilla Falls of Ontika Limestone cliff 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
 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
 Icy 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
 Snow and ice of 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
 Icecles of Martsa Falls in Toyla - Oru Park 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
 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
 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
 Limestone cliff on Jebel Fuwairit. Qatar, October 3, 2014
 Limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Limestone cliff at sunrise on Jebel Fuwairit. Qatar, October 3, 2014
 Overhanging limestone cliff in Harrarah (Al Kharrarah). Southern Qatar, March 27, 2015
 Mushroom-shaped 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
 Edge of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 1, 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
 Broken limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 Edge of a limestone cliff in Maszhabiya (Al Mashabiya) Reserve near Abu Samra. Southern Qatar, April 8, 2016
 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
 Mushroom shaped limestone cliff in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 Plant of Agriophyllum minus in sand 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
 Plant of Agriophyllum minus in sandy area 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
 Buellia and other lichens on a limestone rock 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
 Black lichen Verrucaria 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
 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
 Smooth limestone rocks near the water stream 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
 Some whitish lichen on a limestone rock near the river 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
 Brown and orange crustose lichens on limestone 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
 Dust lichen (Lepraria) on limestone in shade of cliffs 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
 Patches of button lichen (Buellia) on a 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
 White patch of Aspicilia lichen on a limestone rock 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
 Ruffle lichen (Parmotrema) on a mossy 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
 Close up of green Cladonia lichen on sandstone or limestone in a forest 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
 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) in shade on a mossy limestone rock 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
 Ruffle lichen (Parmotrema) on a mossy limestone rock in a red cedar forest 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 mossy limestone rock in Pedernales Falls State Park. Johnson City, Texas, January 11, 2019
 Rock shield lichen (Xanthoparmelia)(?) on a limestone rock in a forest 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.
 Ant Sarah Falls in village of Montour Falls. New York, November 3, 2005
 Shequaga Falls in village of Montour Falls. New York, November 1, 2005
 Lower Falls in Taughannock Falls State Park. Ithaca, New York, October 11, 2005
 Taughannock Falls near Ithaca, view from upper falls overlook. New York, October 8, 2005
 Lake below the falls in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Taughannock Falls, view from upper falls overlook at rain. Ithaca, New York, November 9, 2005
 First snow at Taughannock Falls near Ithaca, view from upper falls overlook. New York, November 23, 2005
 Frozen Taughannock Falls near Ithaca, view from upper falls overlook. New York, December 10, 2005
 Taughannock Falls near Ithaca, view from upper falls overlook, at light snowfall. New York, November 23, 2005
 Taughannock Falls near Ithaca, view from upper falls overlook, at cold morning. New York, November 24, 2005
 Cypress Pool below the falls in Pedernales Falls State Park. Johnson City, Texas, November 2, 2008
 Narrowed stream below the falls in Pedernales Falls State Park. Johnson City, Texas, January 12, 2013
 Creek and a cypress in McKinney Falls State Park, near Upper falls. Austin, Texas, October 26, 2008
 Twin falls in Pedernales Falls State Park, from an overlook. Johnson City, Texas, November 7, 2009
 Falls on the Brazos Park. Marlin, Texas, March 16, 2018
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