Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

An iconic location along the Los Angeles River where countless movie scenes are filmed.

Historic funicular railway, believed to be the shortest railroad in the world.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

An ornate Art Deco tile mosaic representing Nebraskan life, both modern and prehistoric.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

Wind power station for making famous Ketel One vodka.

A statue of the second-tallest Dutchman in history.

These slanted cubic abodes are a creative if odd solution to a zoning pickle.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.