From caves and tunnels ... lava that created magnificent basalt columns on the uninhabited Hebridean island of Staffa, similar to those that form the Giant's Causeway in Northern Ireland. Fingal's ...

Ready to ditch the crowds, go off the beaten track, and explore some of the best unknown vacation spots in the United States? Then you’ve hit the jackpot! From oddly shaped rocks and mysterious ice ...

The Canary Islands not only boast the third largest volcano in the world, but also the largest natural underwater lava tunnel ... a blend of dry and submerged cave sections.

A group of divers has found 100 metres of underground tunnel extending from Pines Cave, near Tantanoola. The tunnel comes within 15m of another cave, with hopes a path between the two can be found.

CLARKSVILLE, Tenn. (WKRN) — Officials at Dunbar Cave State Park reported that the oldest cave art in the U.S. was “completely submerged,” which “has never happened before.” Boardwalks ...

No breakthrough was reported till 8 p.m. on Sunday in the operation launched to rescue eight persons trapped for over 30 hours in an under-construction tunnel in Telangana’s Nagarkurnool district.

An extremely rare cycle of paintings depicting a raucous ritual involving the god of wine has been unearthed in Pompeii, the ancient Roman city buried by volcanic ash and lava in A.D. 79 ...

the Army Corps of Engineers’ Engineer Research and Development Center is preparing to open a state-of-the-art center supporting research at its permafrost tunnel research facility. A new $11.4 ...

Read our pick of the best New York art exhibitions to see in March ... tell the story of the devil and have helped Cave make sense of his own life—and personal tragedy—in a way that his songs cannot.

We rank the 12 Best Places to Visit in Iceland. See which places our readers like the best, and vote for your favorites.