The ritual has been performed uninterrupted for nearly 700 years.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Behind an abandoned storefront is an example of pioneering 1930s gas station architecture.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

The oldest continuously operating fish market in the United States.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

The notorious "Hanoi Hilton" where Vietnamese colonial subjects and later American POWs, including John McCain, were imprisoned.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Monument to a brutal, ineffectual US bombing campaign and a sobering reminder of the human cost of the Vietnam War.

Home of the unusual art of water puppetry, one of Vietnam's oldest curiosities.

This bridge is embedded with a giant steel dragon that breathes fire from its mouth.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

Michael Jackson got Bad and Crocodile Dundee walked on heads in this iconic Brooklyn subway station.

Before online banking and smartphone apps, there was "commuter banking" in the subway in Downtown Brooklyn.

Love is in the air along the small street in Brooklyn.

Ride the subways of yesteryear.

This innocent-looking townhome is actually a subway exit.

The Underground Railroad passed right through this historic Brooklyn Heights church.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.