The first Catholic church in Singapore is a Neo-Gothic colossus with a rich architectural history.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

These towering cliffs jut dramatically from the middle of a barren desert.

This water wheel turned to stone in a matter of decades.

This abandoned bridge over the River Irvine may be the oldest surviving railway viaduct in the world.

Built to transport German U-boats through the never-completed Masurian Canal, the locks near this Polish village are now home to a rope course.

This small museum tucked within a subway station holds pieces from Madrid's past.

A maze of underground tunnels beneath one of the most beautiful forts in Serbia.

Every birth, death, and marriage is recorded in these color-coded leather-bound books.

Bioluminescent firefly squid light up this Japanese fishing port.

The longest and steepest staircase locks in the United Kingdom.