The oldest inn in England served brew to the crusaders.

The largest of London's subterranean rivers and once a mad, bad center of London life.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

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

Museum showcases Japanese sexuality and some amazing ocean views.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

Hot springs monkey spa in the middle of Hell's Valley.

Bioluminescent firefly squid light up this Japanese fishing port.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

Australian Lake set aglow by Noctiluca Scintillans.

A gargantuan crystal kingdom.

Japanese island famous for poison gas and fluffy bunnies.

On Japan's Tashirojima Island, cats are king.

A battle between nature and architecture in the Cambodian jungle.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

A reproduction of earth's many biomes.

Natural cathedral designed by Italian artist Giuliano Mauri.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

An abandoned settlement originally established by British colonialists in the Andaman archipelago.

A picture-perfect town, perfect for blowing up.

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