World War II ended before these tunnels built to protect vital oil from Japanese bombs were ever used.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

Australian Lake set aglow by Noctiluca Scintillans.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

An Australian lake whose pink hue defies scientific explanation.

This skeletal, unfinished Gothic church once housed a miraculous masterpiece by Raphael.

A medieval wash house where people washed clothes in a river allegedly formed by the tears of a mourning nymph.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

This trio of bronze giants celebrate the influential trip to Britain that led to Botswana's independence.

There is only one place in the world where the corners of four nations come together.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

Glowing orb in Minsk houses 8,600,000 items.

Remains of the old fortification along the Western border of the USSR, now an elaborate defense museum.

A small museum in this border city displays the contraband art that has been stolen back from smugglers.

Thanks to its heroic service during WWII this Soviet castle has been turned into a monument towered over by a brutalist titan.

An 18th-century battery complete with original kitchen and garrison.

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

A monument marks the spot where the first Catholic missionaries arrived in Uganda.