Come stay at a live-in art installation.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

Stay in a room with a view... of the bottom of the ocean.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

An underwater road considered a possible Atlantis location.

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

An arsenic-filled pool in the Grand Canyon takes on the appearance of a giant, overflowing pumpkin.

The largest cave shaft in the world is home to thousands of birds and popular with BASE jumpers.

"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Rock face that shares a name with Mary Shelley's famous doctor.

The Connecticut village named for its subterranean thunder.

A humid oasis combines recreation with exploration in a unique underwater cavern.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

One of the deepest blue holes in the world.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

Dramatic river bend surrounds a natural red-rocked pedestal.

Ice roads, deep holes and 3,500 pounds of diamonds.

An emerald-green grotto just a short trip from Austin.

Most-visited and most-photographed slot canyon in the American Southwest.

Museum about life, death, and cannibalism in the Stone Age.

Friction between grains of sand cause a curious "singing" sound.

Granite outcropping that the state's tourism bureau doesn't promote because of its delicate ecosystem.

Nine limestone rock stacks on Australia's "Shipwreck Coast."