This bakery and museum offers tours of the tastes and mythology of Aachen's signature spice biscuit—just don't ask for the recipe.

A new sculpture calls attention to climate change in the centuries-old city it threatens.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

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

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

The first (but not only) upside-down house in Germany.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

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.

This unique medieval artwork featuring the story of the Antichrist remained lost for decades.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

An eerie, derelict amusement park in Berlin.

This concrete residential area doubles as an open-air gallery.

These brass bunnies honor the rabbits that dominated the no-man's-land around the Berlin Wall.

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

Art and a pun, all in one.

The last remnants of a massive medieval wall that once encompassed the city of Berlin.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.