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.

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

A nightmare for the claustrophobic lies hidden in Southeast Asia.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Try not to get slimed in Tribeca.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Elevated freight railway turned wildly successful urban park.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

A beautifully eclectic mix of architectural styles.

A floating cat sanctuary on an Amsterdam canal.

Cat art as far as the eye can see.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

Berlin's old airport.

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

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.