Europe's largest natural bridge has a 19th century royal chateau built into its side.

A strange rock formation with numerous legends trying to explain it.

Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

Local legends say that fairies used to dance in the moonlight here and invite handsome young men into their grottoes.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

A beautiful geyser under environmental threat.

Scattered throughout London are ancient remnants of the city's former bounding wall.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

A close look reveals that the Scottish monument is just slightly off-kilter.

A fake town founded by Western movie stars is now becoming a hip desert community.

A music-filled, booze-soaked oasis in the desert.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The curious underground history of keeping Paris clean.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

The forest that inspired Winnie-the-Pooh's Hundred Acre Wood can be found outside London.

Natural time capsule containing an alien ecosystem.

Each year melting snow turns these Austrian hiking trails into scuba zones.

Submerged busts of communist and socialist figures from the USSR.

Submerged trees jut ghost-like out of an idyllic turquoise mountain lake.

A monument to the art of slicing people open.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.