Cold war icon and onetime "hole" in the iron curtain.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

This conical hill was built as a testing ground for an engineer known as the Glider King.

Super-heavy Nazi architectural experiment.

Berlin's old airport.

The site of good faith and good nature in the fictional world of Kcymaerxthaere.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

After a nearly successful attempt on Hitler's life, the conspirators met their fate in the courtyard of this Berlin building.

Metro station with a claim to rock n' roll fame.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

Antique frame collection with 2,400 frames.

Two giant painted cooling towers make for one of the world’s most epic bungee jumps.

18th century opera in its original splendor.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The city that saw the birth of Sweden is now home to an impressive collection of work from its favorite artist.

The world's oldest individual clonal tree looks like a wimp despite standing tall for 9,550 years.

This statue, deep in a Swedish forest, is all alone, just like the renowned recluse would have wanted.

This massive Trojan ursine was built to be a new tourist symbol for a small Swedish town.

The second oldest anatomical theater is housed in a museum of curiosities.

The single richest source of elemental discoveries in the world.

A plaque on this tiny Swedish island commemorates an unusual Cold War standoff of Soviet submarine intrigue.

A former hen house turned curiosity cabinet displays one man's lifelong fascination with cannibalism.

In the town of Åtvidaberg, the midday sun sets off a loud cannon boom.