Bombed and burned, this monument represents the often controversial ties between Vietnam and Cambodia.

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

A prison with a more than 200-year history.

Standing at the site of his former school, this sculpture celebrates Darwin's groundbreaking contributions to science and his deep connection to his birthplace.

A famed admiral left behind this 17th-century house key when he joined the British Navy.

Across this single-file rope bridge is what has been claimed to be the edge of continental Asia.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

Once a black market electronics marketplace, now an otaku shopper's paradise.

This massive section of quay destroyed by an earthquake is preserved to remember the past.

The world's tallest palm trees look like the whimsical kind of plant you'd find in a Dr. Seuss story.

The (usually) serene burial place of the world's most notorious drug lord.

In the heart of Medellín, an artsy urban complex sets the stage for demonstrations and protests.

Three hundred illuminated pillars form an “artificial forest” in Medellín.

Home to 23 voluptuous and instantly lovable sculptures by one of Latin America's most celebrated artists.

Outdoor escalators and art have helped change what was once a notoriously dangerous part of Medellín.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

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

Amsterdam's former hotspot for public executions and dissections.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A little sculpture with a large wardrobe.

Climb inside an iron crystal magnified 165 billion times its normal size.