Until 1986, Lechuguilla Cave was just a dead-end historical site used briefly for bat guano mining and intermittently visited by enthusiastic cavers. In the 1950’s however, light was shed on this... »

Geological Oddities, Curious Caves, Strange Science, Subterranean Sites | Edited by katiebaker4 and Rachel

Sometimes, simplicity speaks volumes. A short tower can seem imposing on a featureless plain. A tiny word can say a lot if it's on a blank wall. And 40 simple steps can tell a complex story of... »

Curious Caves, Unusual Monuments, Subterranean Sites | Edited by Tawsam, Mark_Casey and others

Lava does weird things. When it flows from a volcano or some other fiery leak in the earth's crust, its surface cools and hardens in the open air, but a viscous molten core continues to flow... »

Fiery Wonders, Martian Landscapes, Geological Oddities, Curious Caves, Natural History, Subterranean Sites | Edited by Mark_Casey and Rachel

Freshwater and Florida isn't always a combination that conjures good feelings among the locals. More often than not, Floridians identify freshwater with swampland, mosquitos, snakes and alligators... »

Natural Wonders, Watery Wonders, Geological Oddities, Curious Caves, Follies and Grottoes | Edited by Mark_Casey and Rachel

Mother Shipton was said to be a witch and an oracle, predicting doomsday horrors and disasters that were to befall the Tudor reign, each morbid forecast recited in prose. Allegedly born as Ursula... »

Natural Wonders, Watery Wonders, Curious Caves | Edited by rhiannonholmes and Rachel

The Marble Caves, or Cuevas de Mármol, are one of the most exhilarating and stunning caves to be found anywhere in the world. The caves, made entirely of marble, were formed when water... »

Natural Wonders, Watery Wonders, Geological Oddities, Curious Caves | Edited by TrevorShawnElia, Rachel and others

The Lava River Cave, located 12 miles (19 kilometer) south of Bend on the east side of Highway 97 and part of the Newberry National Volcanic Monument, is a prime example of a lava tube. Measuring... »

Natural Wonders, Geological Oddities, Curious Caves | Edited by TrevorShawnElia and Rachel

Plunging to a depth of 663 feet (202 meters) in a bay west of Clarence Town on Long Island, Dean's Blue Hole is the world's deepest known blue hole. A blue hole is a term that is often given to... »

Natural Wonders, Watery Wonders, Geological Oddities, Curious Caves | Edited by TrevorShawnElia and Rachel

On a hilltop overlooking the Muga Valley stands the remains of Escaules castle, the medieval fortification that once monitored the border between the counties of Empúries and Besalú. From this... »

Curious Caves, Cultures and Civilizations , Incredible Ruins | Edited by serflac and Rachel

Amidst blindingly green foliage and stunning rock formations is Alabama's Natural Bridge, a sprawling sandstone and iron ore bridge formed over 200 million years ago. Set in Natural Bridge... »

Geological Oddities, Curious Caves | Edited by heavychevy13, atimian and others