1382-1248 - Sandstone caves, multicoloured due to various oxides, containing carved tombs, historic and archaeological Nabataean city of Petra, UNESCO World Heritage Site, Jordan, Middle East
722-282 - Landscape of Valle de Vinales National Park, UNESCO World Heritage Site, Pinar del Rio Province, Cuba, West Indies, Caribbean, Central America
1382-1200 - Colossi of Memnon, massive stone statues of Pharaoh Amenhotep III in the Theban Necropolis, UNESCO World Heritage Site, Luxor, Egypt, North Africa, Africa
1382-820 - Cattle on a cliff over the valleuse of Vaucottes, around Etretat, Cote d'Albatre, Pays de Caux, Seine-Maritime department, Upper Normandy region, France, Europe
802-152 - A man on a very long and overhanging climb on the famous limestone cliffs of the Mascun Canyon, Rodellar, Sierra de Guara, Aragon, southern Pyrenees, Spain, Europe
802-151 - A woman tackles a very difficult climb on limestone cliffs near Siuarana, a medieval village near Reus and Barcelona, Catalonia, Spain, Europe
802-146 - A woman on an overhanging traverse climb on the famous limestone cliffs of the Mascun Canyon, Rodellar, Sierra de Guara, Aragon, southern Pyrenees, Spain, Europe
802-138 - A woman on a technical face climb on the limestone cliffs of the Mascun Canyon, Rodellar, Sierra de Guara, Aragon, southern Pyrenees, Spain, Europe
802-52 - A climber makes her way up a steep and difficult route on the limestone cliffs in the Aveyron region, near Millau and Toulouse, south west France, Europe
802-51 - A climber makes her way up a steep and difficult route on the limestone cliffs in the Aveyron region, near Millau and Toulouse, south west France, Europe
802-35 - A rock climber tackles a very difficult route on the steep walls of Gordale Scar, a famous limestone ravine near Malham Cove, North Yorkshire, England, United Kingdom, Europe
1387-492 - Aerial view of a healthy fringing reef along the edge of Komodo Island in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for its marine biodiversity as well as its infamous Komodo dragons.
1387-471 - Aerial view of beautiful limestone islands scattered about the seascape in Raja Ampat, Indonesia. This tropical area is known for its extraordinary marine biodiversity and is a popular destination for divers and snorkelers.
1387-448 - Rugged and remote, limestone islands rise around a beautiful lagoon seascape in Raja Ampat, Indonesia. This region is known as the heart of the Coral Triangle due to its incredible marine biodiversity. It is a popular destination for scuba divers and snor
1387-449 - Morning light shines on a beautiful limestone island in Raja Ampat, Indonesia. This region is known as the heart of the Coral Triangle due to its incredible marine biodiversity. It is a popular destination for scuba divers and snorkelers.
1387-313 - Limestone islands surround a beautiful lagoon in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.
1387-308 - Limestone islands surround a beautiful lagoon in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.
1387-206 - Forest-covered limestone islands surround a gorgeous lagoon in a remote part of Raja Ampat, Indonesia. This beautiful region is known as the heart of the Coral Triangle and is a popular destination for scuba divers and snorkelers.
1387-205 - A beautiful coral reef grows near a set of limestone islands in Raja Ampat, Indonesia. This remote, equatorial region is known as the heart of the Coral Triangle. It is a popular destination for scuba divers and snorkelers.
1387-204 - Rugged limestone islands surround a gorgeous lagoon in a remote part of Raja Ampat, Indonesia. This beautiful region is known as the heart of the Coral Triangle and is a popular destination for scuba divers and snorkelers.
1359-1393 - Red street of Monastery of Santa Catalina de Siena, UNESCO World Heritage Site, Arequipa, Arequipa Province, Arequipa Region, Peru, South America
1116-53659 - Surreal landscape of White Pocket with stormy clouds gathering overtop. They are comprised of swirling, multicolured Navajo Limestone with domes, hoodoos and potholes, Arizona, United States of America
83-13501 - Tourist tour boats moored on the Pute River in this karst limestone region, Ramman-Rammang, Maros Pangkep Geopark, UNESCO Global Geopark, South Sulawesi, Indonesia, Southeast Asia, Asia
1385-142 - Scenic limestone cliffs with grassy slopes and rocky terrain under a cloudy sky in a mountainous region, North Yorkshire, England, United Kingdom, Europe
801-4215 - Great Sphinx of Giza, Pyramid of Khafre (Chephren) in the background, Giza Pyramid Complex, UNESCO World Heritage Site, Giza, Egypt, North Africa, Africa
802-789 - The intertidal zone of the Quantock Coast, West Somerset, contains an abundance of geology and wildlife. It is a Site of Special Scientific Interest (SSSI) and is of international geological importance.