Europe's official "zero-level," the equator of elevation.

The last of Amsterdam's original sea level markers remaining in place.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

A public urinal so pretty, it was declared a national monument.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

A curious collection dedicated to human and animal anatomy and pathology.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

The world's only museum devoted to the wonders of fluorescence.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

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

A surreal museum of extraordinary industrial objects.

A slice of central Asia in the middle of Berlin.

Inside this Jewish cemetery is a memorial to soldiers who deserted the German army and were executed.

The most visited, and possibly most controversial, museum in Germany.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Blitzkrieg bop your way through Berlin's Ramones Museum.

This watchtower once presided over the Berlin Wall.

Someone loved this song enough to carve all of its lyrics onto a tree trunk in a Berlin park.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

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

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

Two flush headstones mark the only known graves to be embedded in an airport runway.

An eerie smiling woman looms above the granite tombstones.

This haunting tombstone comes complete with a heartbreaking story of love and loss.