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

South Korea's largely symbolic, barely used gateway to the North.

Numerical symbolism abound at East Asia's oldest observatory.

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

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

The remains of a British railway rusting in the jungle mist of a Brazilian mountainside.

A snake farm famous for its venemous varieties.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.

The bookstore with bookshelves built into unlikely places.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

The pedestrian traffic signals in Brazil's teeming metropolis light up with clues to nearby landmarks.

An enigmatic mural hiding in plain sight in one of São Paulo's busiest metro stations.

The crypts are so large they're basically their own underground church.