This giant, 83-year-old ship elevator is an engineering feat to behold.

A man-made slag heap that you can "ski" down, and is home to the world sandboarding championships.

This East German military command bunker was ready for World War III.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

This magnificent museum claims to house the cranium of a disciple and the skull of a pope.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

When the rain falls, this drain system turns into a musical instrument.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.