A memorial for public executions that dates back to the 14th century.

This building contains a door only used by members of the royal family.

The real clothing store that inspired a fictional spy organization's front.

At almost 1,000 years old, this is the oldest known door in all of Britain.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

A free, canine-friendly alternative watering hole near the more famous Barton Springs.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

This working class sculpture pounds his hammer all the livelong day.

One of the largest trees of its kind in California.

The second-tallest water tower shaped like a peach in the American South.

Auburn's iconic eagle flight goes back to a 19th century eagle that dropped dead on the field after inspiring the football team to victory.

One person’s lost luggage is another person’s treasure.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

There has been an astronomical clock on this spot since the 14th century.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

This unusual lava tube spouts seawater during high surf.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This legendary urban waterfall creates a dazzling display of rainbows.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

A beach made of semi-precious green sand on the Big Island of Hawaiʻi.