This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This sports stadium was made from 25,000 cypress trees and ranks among the world's largest wooden domes.

Huts like this were once a hub for the female divers who collected pearls and seafood off Japan's coasts.

These Japanese ruins have been brought back to life with elaborately recreated buildings.

Colloquially known as “piss alley,” this narrow street filled with tiny bars and barbecue stands looks like it was pulled straight out of “Blade Runner.”

A bronze statue dating back as far as 1252, still has remnants of gold on its right cheek from ancient gilding.

Once a black market electronics marketplace, now an otaku shopper's paradise.

A Swedenborgian glass church surrounded by redwoods sits perched atop a massive landslide area.

Stalactites and stalagmites in a beautifully lit cave.

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

Rare recess caves fill this unbelievably beautiful Ohio park.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

Pompeii's less famous neighbor is still revealing her secrets.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

A beautiful but toxic fountain of mercury.

The eccentric mansion of one the most popular horror authors of modern times.

The longest navigable underground river in the United States is home to countless blind and albino animals.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Renaissance villa and gardens complete with a tormented colossus.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.