These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

The remnants of an early American attempt at missile defense.

The metal-free wooden towers of Brück.

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

Launch site for nuclear war against Western Europe.

Retirement home for giant obsolete machines.

The world's oldest bookshop still in operation.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.

A magically clear, blue river that seems to spring from nowhere.

A majestic hotel for dreamers rises from the center of a fairytale wood.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Hamburgers are intensely proud of their tunnel beneath the river.

Towering basalt columns, a creation of fire and ice.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

A nuclear bunker built to shelter the politicians and important people of Scotland in case of nuclear attack.