Here's a look at some of the most amazing cave explorations along Iceland's remote coastlines. Located in Snaefellsnes Peninsula, Vatnshellir Cave is one of the most accessible lava tubes in Iceland.

Sheer drama. That's what the Great Sand Dunes are. Starkly beautiful desert dunes set against a backdrop of pretty, ...

It's not just about the rock formation; keep your eye out for petrified ... This is where geology gets weird in the best way, with lava tube caves, jagged volcanic rock, and a landscape that ...

This rock formation is home to one of California's ... Beneath the surface of Lava Beds National Monument lies a network of lava tube caves. Grab a flashlight and walk into the cool darkness ...

Kalaupapa Peninsula sits on Molokai’s northern coast, cut off from the world by towering sea cliffs and rough waters. From ...

The Devil’s Kettle is a waterfall where the Brule River splits in two, with one half flowing normally while the other half ...

Lava caves, also called lava tubes, are formed as a result of volcanic ... Unlike most caves, however, the formation of Nutty Putty cave started at the bottom. Usually, a limestone cave (solution ...

After all, what better antidote to that hectic city life than a visit to an impressive natural rock formation? Without trekking too ... This system of underground caves (well, lava tubes) was produced ...

Hawaii is home to some of the most incredible lava tubes that are open to exploration. These include Thurston Lava Tube in ...

This NASA/ESA Hubble Space Telescope image features the picturesque spiral galaxy NGC 4941, which lies about 67 million light ...