An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

Home to the world's oldest functioning orrery.

A monument hidden in the woods built in 1938 as a getaway for a Dutch museum curator.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

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

A fascinating assortment of cave dwellings, medieval ruins, and sarcophagi are being devoured by the forest.

A stunning fountain depicting a mythological she-goat carved directly into the rocks on the grounds of a Renaissance palace.

A modern-day Lascaux cave underneath Paris.

A winding, blood-red tunnel of hardened lava navigable by foot.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

"Only the devil could play golf here."

The restored and active Victorian-era final resting place of San Francisco.

Home to the "Circus" trees created by Axel Erlandson.

Quite simply the largest tree in the world (by volume).

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The rocks in this arid basin leave trails of movement behind them.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

Deco Modern sculptures of the people of the Pacific, cast for the 1939 Golden Gate International Exposition.

A promotional sun clock on the site of San Francisco's great raceway.

Folk art crafted from discarded vegetable crates.