Giant granite sculptures representing family on the northern coast of Spain.

This panoramic lift provides a futuristic ride up San Pedro Mountain.

The oldest Roman lighthouse still in use.

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.

One of America's oldest private membership libraries was long one of New Haven's best kept secrets.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

"Polynesia on the Plains."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The world's largest Holstein cow.

Golden Gate Park's historic collection of plants.

A hidden subterranean installation offers a view of the sky.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This downtown Dallas art installation is always on the lookout.

Two massive and unstable sinkholes are yearning to unite, and their consummation could be catastrophic.

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

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

Situated on a sacred Inca site, this 16th-century cathedral took nearly 100 years to build.

The little bear in the "funny kind of hat" has made his way from London back to Peru.