A flamboyant five-story building in Bulgaria resembles a crawling snail.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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

Hollowed out cedar log tubs set in an ancient towering forest.

Once the most densely populated place in the world, this island is now a ghost town.

Every autumn, this hillside is ablaze with red summer cypress.

This South London cemetery holds the remains of more than 15,000 people.

Monasteries on rock pillars, once accessible only by frayed ropes.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Ruins of a German Castle on top of a towering stone pillar.

The first declared National Monument in the United States.

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

Stroll through a wonderland of stupendous moss-covered trees.

Northern Ireland's Brobdingnagian stepping stones.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The atmospheric road was never meant to be so creepy.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A taste of the macabre Tokyo's ritzy shopping district.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

Site of a former hidden treehouse in New Orleans.

A submerged archeological park still holds the wonders of a Roman Sodom.

The only theatre in the world constructed specifically for sound movement.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."