A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Go inside to really appreciate this 500-year-old technological masterpiece.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

The yawning maw of this pagan visage is said to bite off the hands of liars.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Disused penal colony features prisoner artwork, some sketched in human blood.

The massive machine creates cracking displays of indoor lightning.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The world's brightest bioluminescent bay.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The crumbling remnants of this 19th-century quarantine hospital hint at the touristy island's darker past.

This small fort played a huge role defending Puerto Rico’s capital city.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.