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.

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

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

An extraordinary natural landscape of mountains, waterfalls, and rocky cliffs riddled with tunnels.

Memorial to the father of the Republic of China.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

The glacier tucked within a New Zealand rainforest.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

This historic Victorian hotel has a scandalous history of affairs and murder.

On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

An 18th-century Spanish watchtower made entirely of seashell and concrete.

Ruins of a Carnegie family mansion on Cumberland Island.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

A statue honoring 44 continuous years of greeting passing ships.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

This kitschy tavern is also home to rare early editions of "Treasure Island."

This research center for rare prosimians is studying how they sleep to help prolong human life.

This fallen red oak tree has been transformed into a piece of trailside art.

This statue honors the author's groundbreaking family story.

This Annapolis home was built by one of the signers of the Declaration of Independence.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones’ locker.

Step inside Lucy, the world's largest "elephant."