Cold war icon and onetime "hole" in the iron curtain.

Ming Dynasty necropolis raided during the Cultural Revolution.

Enormous burial mounds of ancient emperors.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The site of Paul Revere's historic two lantern warning.

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The first Catholic church in Singapore is a Neo-Gothic colossus with a rich architectural history.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The most visited, and possibly most controversial, museum in Germany.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

This ancient Chinese observatory still contains early astronomy technology.

The most famous location in China was home to whole dynasties worth of imperial rulers.

A historical convent known for taking in bad luck babies left on its doorstep is now an upscale shopping center.

The most playful of the life-sized statues that make up Singapore's "People of the River."

One of America's most historic homes also holds a startling literary legacy.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

This cemetery served as the only official burial grounds in Cambridge for nearly 200 years.

Impossibly life-like natural history models created out of glass by a father and son.

This ancient temple is set up to take you on a pilgrimage of self.

Singapore's landscaping project is home to 18 incredible Supertrees.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.