An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.

An unassuming secret door once led to a legendary watering hole.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

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

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

Over 80,000 carved wood blocks make up one of the world's oldest intact Buddhist canons.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This dangerous-looking suspension bridge may have been too unstable to remain open.

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This highest bridge in the world spans such a great chasm that it had to be established using rockets.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This historic stone bridge has an entire neighborhood clinging to its sides.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.