 Ontika Limestone cliff and Gulf of Finland from observation platform in Saka 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
 Ontika Limestone cliff with Kivisilla Falls 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
 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
 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
 Forest along Gulf of Finland near Karjaoru Falls in Saka 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
 Icy 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
 Frozen 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
 Icy masses 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
 Winter view of Martsa Falls 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
 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
 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
 Edge of a 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
 Broken 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
 Mushroom shaped limestone cliff in area of Nakhsh Mountain near Salwa Road in southern Qatar, May 8, 2015
 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
 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
 Port Sullivan Church at County Road 262, Milam County. Texas, July 24, 2022
 Unicorn plant (devil s claw, Proboscidea loisianica) on roadside of County Road 264 in Branchville, Milam County. Texas, July 24, 2022
 Tippecanoe County Amphitheater near Battle Ground, Indiana, February 14, 1998.
 Breakers Mansion before sunrise, view from Cliff Walk trail. Newport, Rhode Island, February 6, 2005.
 A small cliff on the southern side of the Bokek creek canyon, view to the north. The Middle East, February 22, 2001
 Vineland Mansion of Salve Regina University from Cliff Walk in Newport at sunrise. Rhode Island, February 5, 2004, 7:05 a.m.
 Zigzag cliff-brake fern (Pellaea ovata) on slope of the dome in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Rocky shore of Atlantic Ocean at sunrise, view from Cliff Walk trail. Newport, Rhode Island, February 6, 2005.
 Ochre Court Mansion of Salve Regina University from Cliff Walk in Newport at sunrise. Rhode Island, February 5, 2004, 7:02 a.m.
 Cliff Walk Trail at crossing with Ruggles Avenue, near Ochre Point at morning. Newport, Rhode Island, February 6, 2005.
 Fossilized oyster sea shells Ostrea latimarginata(?) in a limestone layer (Dukhan Limestone Member) of Dammam Formation in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Limestone escarpments near Harrarah in southern Qatar, February 14, 2014
 Zigzag cliff-brake fern (Pellaea ovata) in shade of big rocks on Freshman Mountain in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Ternate cliff-brake fern (Pellaea ternifolia) and spikemoss Selaginella corallina in a stone depression in Enchanted Rock State Natural Area. Fredericksburg, Texas, December 25, 2018
 Rough Point from Cliff Walk at Sheep Point. Newport, Rhode Island, February 5, 2004.
 View in direction of Rough Point from Cliff Walk at Sheep Point. Newport, Rhode Island, February 5, 2004.
 Low limestone cliffs in Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, February 19, 2010
 Chalky limestone in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014
 Low limestone hills in Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, February 19, 2010
 QNHG (Qatar Natural History Group) exploring fossils in limestone layer (Dukhan Limestone Member) of Dammam Formation in Jaow Al Hamar depression south from Trainah. Southern Qatar, November 6, 2015
 Forest on Ridge Trail near Trailpoint 13 in Sourland Mountain Preserve. Somerset County, New Jersey, May 6, 2007
 Erosion of beach limestone in Purple Island (Jazirat Bin Ghanim). Al Khor, Qatar, February 14, 2015
 Limestone rocks in a desert on roadside of a road to Sawda Natheel. Southern Qatar, February 5, 2016
 Midcliff, Fairhaven and Angelsea mansions near Ochre Point from Cliff Walk at Sheep Point. Newport, Rhode Island, February 5, 2004.
 View in direction to Rough Point from Cliff Walk at Sheep Point, behind Gull Rock tunnel. Newport, Rhode Island, February 5, 2004.
 Sand covering chalky limestone in area of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014
 Tiny fossilized echinoderm or sea urchin in limestone in coastal area in south-western Qatar, February 7, 2014
 Blunt-lobed cliff fern (Woodsia obtusa) on moss at a creek crossing in Lick Creek Park. College Station, Texas, February 1, 2021
 Dogwood in a forest on Ridge Trail east Trailpoint 13 in Sourland Mountain Preserve. Somerset County, New Jersey, May 6, 2007
 Prairie sandbur (Trailing Ratany, Three Fans, Krameria lanceolata) on limestone on Moore s Hill Outcrop at FM Road 3090 near Navasota. Texas, April 21, 2018
 Stone houses at Kiriku 4 in Tallinn old town. Estonia, August 14, 2024
 Small shops at at Muurivahe 30 in Tallinn old town. Estonia, August 14, 2024
 Goodwin and McDonalds at Muurivahe 38a in Tallinn old town. Estonia, August 14, 2024
 Rough Point, New Lodge and Ocean View mansions from Cliff Walk at Sheep Point, behind Gull Rock tunnel. Newport, Rhode Island, February 5, 2004.
 Rough Point, New Lodge and Ocean View mansions from Cliff Walk at Sheep Point, behind Gull Rock tunnel. Newport, Rhode Island, February 5, 2004.
 Stratified layers of limestone and Miocene deposits of the Dam Formation on the slope of Jebel Al-Nakhsh in south-western Qatar, February 7, 2014
 Limestone cliffs with fossils on Ras Abrouq peninsula in west central coastal area, north from Zekreet. Qatar, February 13, 2010
 A small spring flower on a limestone plateau in Judean Desert south from Nahal Mishmar. The Middle East, February 21, 2002
 Hungarian Institute at Kiriku Plats 1 in Tallinn old town. Estonia, August 14, 2024
 View of St. Nicholas Church from Ruutli 9 in Tallinn old town. Estonia, August 14, 2024
 Red roofs and bay from Kohtuotsa viewing point at Kohtu 12 in Tallinn old town. Estonia, August 14, 2024
 Ministry of Economic Affairs and Communications at Harju 46 in Tallinn old town. Estonia, August 14, 2024
 Pale green house at Raekoja Plats 4 in Tallinn old town. Estonia, August 14, 2024
 Cinema Soprus and Club Hollywood at Muurivahe 16 in Tallinn old town. Estonia, August 14, 2024
 Small pink brittlegill (Russula) mushrooms in muddy area of baygall forest on D. L. property. Bleakwood, Newton County, Texas, June 11, 2022
 Stone fence and a red house at Kiriku 8 from Toom-Kooli 21 in Tallinn old town. Estonia, August 14, 2024
 Saint Alexander Nevsky Cathedral at Lossi Plats in Tallinn old town. Estonia, August 14, 2024
 Ancient houses from Kohtuotsa viewing point at Kohtu 12 in Tallinn old town. Estonia, August 14, 2024
 Button lichen (Buellia) on limestone in Old Independence Cemetery near Independence. Texas, February 10, 2019
 Button lichen (Buellia) on a limestone tomb in Old Independence Cemetery near Independence. Texas, February 10, 2019
 Buttoned rosette lichen (Pyxine) on limestone in Old Independence Cemetery near Independence. Texas, February 10, 2019
 Limestone gallery in Gatchina Palace. Gatchina, suburb of Saint Petersburg, Russia, February 12, 2013
 Gills of small fibrecap mushrooms Inocybe paludinella(?) in a dried swamp of baygall forest on D. L. property. Bleakwood, Newton County, Texas, June 11, 2022
 Underside of small fibrecap mushrooms Inocybe paludinella(?) in a dried swamp of baygall forest on D. L. property. Bleakwood, Newton County, Texas, June 11, 2022
 A cliff and forest of Enfield Glen, view from Rim Trail, in Robert H. Treman State Park. Ithaca, New York, November 2, 2005
 Greenish buttoned rosette lichen (Pyxine) on limestone in Old Independence Cemetery near Independence. Texas, February 10, 2019
 Fairytale views from Patkuli viewing platform at Toom-Ruutli 12 in Tallinn old town. Estonia, August 14, 2024
 Towers and walls from Patkuli viewing platform at Toom-Ruutli 12 in Tallinn old town. Estonia, August 14, 2024
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