The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

Cascading waterfalls mark the gateway to the ancient burial place of Clan Macnab.

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

Inside this museum is an ongoing excavation of an ancient shipwreck.

This once rural mansion now sits in the heart of the city.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

An abandoned film set location for a remote spaceport in a galaxy far, far away hides in the Tunisian desert.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

The longest canal aqueduct in England was built without a plan to get water past the moving boats.

To literally keep their waste out of their own backyards, the citizens of this English city built an impressive sewer system that is still in use today.

An 18-mile-long tunnel for sewage waste will soon wind within the bowels of Washington, D.C.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

Comprehensive gaming collection of over 30,000 electronic games and consoles.

Buried beneath the New Mexico sands are believed to be millions of copies of Atari's E.T. video game.

Museum dedicated to the art of cutting and polishing stones.

This stunning limestone waterfall is the highest in Estonia.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

This Seattle joint serves food inside an old train car once used by FDR.

A 2,000-ton rock resting in a state of a delicate balance.

A breathtaking viewing platform over the Alps.

An optical illusion found amid a logged redwood forest.

A grove of "candelabra redwoods" deep in California's Lost Coast.

Anyone can control this glittery light installation with just a phone call.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.