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

An arts and culture complex that was once a derelict American military installation in the civilian control zone of the DMZ.

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

The place nearest Seoul where it’s easy to get a good look at North Korea.

This tiny museum immortalizes the birthplace of an iconic Chinese-Korean noodle dish.

Booksellers and public artworks fill this vibrant promenade along the disused railroad tracks.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

A chilling monument to Korean patriots who resisted the Japanese occupation.

Only a few pieces remain of a grand 16th-century water clock that once announced the changing hours with the sound of bells, gongs, and drums.

The site of the last royal wedding in Korea.

This pagoda was once the central feature of a Buddhist temple that no longer exists.

Its humdrum facade only adds to its electrifying appeal: a rooftop with panoramic views of a shapeshifting metropolis.

A family of distorted sculptures stands outside Seoul's former imperial palace.

Home to more than 13,000 pieces of war memorabilia and military equipment.

This ancient Corinthian helmet is South Korea’s only national treasure of Western origin.

Celebrating the history of Hangul, the Korean writing system invented by King Sejong to improve his realm’s literacy.

The largest cluster of the Joseon dynasty’s royal tombs, home to the burial sites of 17 kings and queens.

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

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

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

Chelsea's soldiers were given strict orders when crossing this historic bridge.

This Underground station has been a popular filming location for decades, even before it closed.