The Guardian of Tallinn.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

It houses the remains of a 17th-century version of the Titanic.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

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

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

Home to three historic ships from the age of Vikings.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

Underground farm located in a former bank vault deep within the bowels of Tokyo's business district.

After a profound show of devotion for his master, a dog becomes the symbol of loyalty for an entire nation.

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

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

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

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

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

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

An extravagant monument to an extravagantly unpopular Emperor.

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

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

A museum in a law office, filled with authentic and counterfeit goods.

A condom-covered Thai restaurant that is more concerned with birth control than food.

A tall karst islet popularized by 007.