Two stunning 17th-century libraries and a cabinet of curiosities.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

A seemingly endless landscape of pure salt stretches far across Bolivia.

Stunning wetlands ablaze with pink lotus flowers.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Site of a former hidden treehouse in New Orleans.

A strange house built only at night, with rumored mystic inspiration.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

A hand-built folk art installation covered with messages of God's love.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Famously misunderstood wonder of the ancient world

Try not to get slimed in Tribeca.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Towering basalt columns, a creation of fire and ice.

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

Notorious artist squat renovated into legal studios.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A trash dump made beautiful by nature's power.

The ghostly remains of an accidental sea.

The real life Hobbiton, this sheep farm has been forever transformed since being built for The Hobbit film series.