Asia's largest limestone cave is home to a world of plastic goblins and gold mining history.

The 400-year-old remains of the samurai invasion of Korea.

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

South Korea's only sex-themed park.

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

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

A 32-acre fun park dedicated to all things cheese.

Plenty of old carney magic still haunts this photogenic amusement park.

Nearly three tons of weapons from the Vietnam War still remain in this small, hidden museum.

Drink and learn at this striking ode to coffee culture and history.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

This unique formation is characterized by hexagonal basalt rocks stacked in unique formations.

One of Vietnam's most iconic landmarks was built by Japanese traders and is now in danger of sinking.

Giant pagoda houses the car that drove Thích Quảng Đức to his death by self-immolation.

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

A sculpture park that takes the use of clay to a whole new level.

The wartime prison now features haunting sculpted reenactments of the atrocities that took place there.

This whimsically named Vietnamese stream is closer to a walkway than a waterway.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

This cavern was used as a hidden hospital and safe house during the Vietnam War.

The lavish temple of the Cao Dai religion that includes Buddha, Mohammed, Joan of Arc, and Victor Hugo.

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.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.