One of the largest Native American shell middens stands 30 feet tall.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

The island residents are known for taking their quirky sense of humor with them to the grave.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Ancient ruins hidden underneath a modern luxury hotel.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Rome’s legendary peephole vista is also a former Crusader stronghold.

Legendary site where an evil bishop was devoured by rodents.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Public access to clean drinking water was an instant hit among the masses.

A naturally mummified 2,000-year-old man.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

The famous polar explorer stands outside the Royal Geographical Society's headquarters.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.