🌋 Explore the interior of Iceland's Thrihnukagigur volcano ICELAND / Visit a volcano / 🌄 See the Fairy chimney formations in Cappadocia TURKEY / Visit Craters of the Moon National Monument IDAHO / 🏞️ Visit the Jeita Grotto LEBANON / Visit Pamukkale TURKEY / Witness the Eisriesenwelt (Ice Caves) in Werfen AUSTRIA / See the Golden Waterfall in Gullfoss ICELAND / Drive into the Bryce Canyon Amphitheater UTAH / Visit Mungo National Park AUSTRALIA / 🪨 Throw a stone off the white cliffs of Dover ENGLAND / 🏜️ Visit the Badlands / 🐍 Visit the Vermillion Cliffs UTAH / Visit Dinosaur Provincial Park CANADA / See the skeletons of Ice Age animals in the Wookey Hole Caves ENGLAND / Look inside the mouth of a volcano / See the Moeraki Boulders NEW ZEALAND / Visit The Lost Sea in Craighead Caverns TENNESSEE / Visit the Linville Caverns NORTH CAROLINA / See the sliding stones of Death Valley CALIFORNIA / Visit Cave of the Mounds WISCONSIN / Visit the Lost World Caverns VIRGINIA / Visit Crater of Diamonds State Park ARKANSAS / Visit the Grand Staircase National Monument UTAH / See the San Andreas Fault Line CALIFORNIA / Visit Crystal Cave BERMUDA / Explore the Škocjan Caves SLOVENIA / Visit Zhangye Danxia Landform CHINA / Take the Lewis & Clark Caverns Tour MONTANA / Explore the Rio Secreto caves MEXICO / Visit the Dinosaur Valley in Wookey Hole ENGLAND / See dino skeletons in the Dinosaur Provincial Park in southern Alberta CANADA / Walk the sea floor around the Bay of Fundy islands CANADA / Experience Karijini National Park AUSTRALIA / Climb Red River Gorge KENTUCKY / 🐠 See the giant coral boulders in Bathsheba BARBADOS / Visit Pinnacles National Park CALIFORNIA / See the Devils Marbles up close AUSTRALIA / Soak up the spectacular Flinders Ranges AUSTRALIA / Visit Drumheller CANADA / Watch a sunset from the dunes of Valle de la Luna CHILE / Admire the white chalk cliffs of the Jasmund National Park GERMANY / See the pinnacles at Nambung National Park AUSTRALIA / Fly over the Bungle Bungles AUSTRALIA / Visit Cathedral Caverns State Park ALABAMA / Visit Meteor Crater ARIZONA / Visit the White Cliffs of Dover ENGLAND / Visit Russia's 'Gateway to Hell' RUSSIA / Visit Remarkable Rocks AUSTRALIA / See the fossil forests of Joggins CANADA / Visit Cave of the Winds COLORADO / Dive Florida's Freshwater Caves FLORIDA / Visit Mississippi Museum of Natural Science MISSISSIPPI / Explore Harrison's Cave by electric cart BARBADOS / See the “Mouth of Hell”, Boca do Inferno PORTUGAL / Visit Red Rocks COLORADO / Explore the volcanic region of Ampefy MADAGASCAR / Visit the Willandra Lakes Region AUSTRALIA / Explore Luray Caverns VIRGINIA / Visit Fjaðrargljúfur Canyon ICELAND / Take a jeep trip through the Negev desert ISRAEL / Take a tour through the Postojna Caves SLOVENIA / Witness the Alofaaga Blowhole near Saleaula SAMOA / Explore the Berca mud volcanoes near Buzau ROMANIA / Explore the geysers and volcanoes of Kamchatka RUSSIA / Visit Bruce Peninsula National Park CANADA / Scale Red-Rock Towers UTAH / Journey to the centre of the earth in Puerto Princesa Subterranean River National Park PHILIPPINES / Visit the mud volcanoes of Qobustan AZERBAIJAN / See the Blue Creek Cave in Toledo BELIZE / Take a vacation to somewhere with a volcano / Visit the Moeraki Boulders NEW ZEALAND / Photograph the Flaming Cliffs (Bayanzag) MONGOLIA / Visit Yarrongabilly Caves AUSTRALIA / Discover waterfalls and volcanic fissures in Lubango ANGOLA / Witness the Blow Holes along the Mapu ‘a Vaea coastline of Houma TONGA / Look at meteorites in Post St Mall NAMIBIA / Explore the Punkevni Caves CZECH REPUBLIC / Explore Son Doong Cave VIETNAM / Visit Putangirua Pinnacles NEW ZEALAND / Visit Teide National Park SPAIN / Visit Mount Etna ITALY / Visit Wolfe Creek Crater AUSTRALIA / Visit Providence Canyon GEORGIA / Visit Polar Caves Park NEW HAMPSHIRE / Stand at the edge of the Ramon Crater ISRAEL / Travel through a manmade tunnel at Devil's Throat Cave to see the underground waterfalls BULGARIA / Visit the Crystal Cave of Svmnafellsjvkull ICELAND / Visit the Ischigualasto formation ARGENTINA / Explore the Blyde River Canyon Nature Reserve SOUTH AFRICA / Spot gypsum formations at the Kugitang cave UZBEKISTAN / See the Upsala glacier ARGENTINA / Descend into the crater of the active volcano Karthala COMOROS / Visit the Giant's Causeway in Northern Ireland UNITED KINGDOM / Discover the volcanic lakes at Nevado de Toluca MEXICO / Helicopter over a volcano / Visit Blue Mounds State Park MINNESOTA / Visit Crystal Onyx Cave KENTUCKY / Visit Linville Caverns NORTH CAROLINA / See Pico Cão Grande (Great Dog Peak) SÃO TOMÉ AND PRÍNCIPE / See a volcanic lake at Jebel Marra SUDAN / Hike to the top of Irazú volcano COSTA RICA / See the half saline, half fresh water Lake Balkhash KAZAKHSTAN / Explore the famous salt mines of Sal, built inside a dormant volcano CAPE VERDE / Visit Lake Assal surrounded by dormant volcanoes and lava fields DJIBOUTI / Visit the Demanovska Ice Cave SLOVAKIA / Visit Ohio Caverns OHIO / Visit Sequoyah Caverns ALABAMA / Visit Howe Caverns NEW YORK / Visit Ein Avdat National Park ISRAEL / Visit the Dachuandong Arch in Guizhou Province CHINA / Visit Goosenecks State Park UTAH / Visit Chimney Bluffs State Park NEW YORK / Visit Naracoorte Caves National Park AUSTRALIA / Visit Ischigualasto Provincial Park ARGENTINA / Hike Purgatory Chasm MASSACHUSETTS / Visit Parque de las Cavernas del Rio Camuy PUERTO RICO / Explore the Underground Cenotes in Mexico / Visit the Gaotun Natural Bridge in Guizhou CHINA / Visit the Hazarchishma Natural Bridge in Bamyan Province AFGHANISTAN / See La Portada natural monument near Antofagasta CHILE / See the Devil's Throat Cave at the Trigard Gorge BULGARIA / Visit the Glarus Thrust SWITZERLAND / See the Blanchard Springs Caverns ARKANSAS / Visit Thrihnukagigur ICELAND / Visit the Washington State Scablands WASHINGTON / Visit Fort Rock OREGON / See dinosaur fossils in La Paz / Peer into Macocha, a sinkhole at the heart of Moravský Kras CZECH REPUBLIC / Visit Buffalo Rock State Park and Effigy Tumuli ILLINOIS / Scale the active volcano Mt Kanlaon PHILIPPINES / Explore the Fantale crater ETHIOPIA / Go spelunking in Kievskaya UZBEKISTAN / Explore the Anahulu Cave TONGA / Witness the petrified forest on the mountain of Thaba-Ts'oeu LESOTHO / Visit Mississippi Palisades State Park ILLINOIS / Visit the Burgess Shale CANADA / Visit the Škocjan Caves SLOVENIA / Visit the Undara Lava Tubes / Walk through the Valley of the Moon BOLIVIA / Visit Makhtesh Ramon ISRAEL / Visit Timanfaya National Park SPAIN / Visit Monument Rocks KANSAS /