A monument to the two U.S. officers killed by North Korean troops while trying to trim a poplar tree.

The site of many tense prisoner exchanges across the Military Demarcation Line between North and South Korea.

Secret North Korean passage discovered below the world's most dangerous border.

The best place for scenic views of the DMZ and North Korea.

South Korea's largely symbolic, barely used gateway to the North.

A large visitor's complex and place of remembrance on the outskirts of the DMZ.

Europe’s oldest natural human mummy.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The world's first and only escalator for lazy bicycles and their daunted riders.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Avoid gangster interaction while window-shopping.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Rummage through this sunken ship, but leave your scuba gear at home.

There must be a pun in this haystack somewhere...

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Hidden in plain sight on a pair of Manhattan subway tunnels are a pair of public instruments that sing to each other.