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

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

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

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

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

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

The burial ground of two kings and a queen is now a calm city park in the middle of bustling Seoul.

The supreme shrine of the state.

A gift from the Soviet Union in the 1980s, this is the only statue of the Soviet dictator in Southeast Asia.

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

This French colonial post office is arguably the grandest in all of Southeast Asia.

Witnesses claim the Virgin Mary statue outside the church once mysteriously shed a single tear.

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.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

The spot where the two men ate together now stands enclosed in glass.

An extravagant monument to an extravagantly unpopular Emperor.

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

This Vietnamese hell cave lets visitors take a walk through a devilish underworld full of demons.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.