This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

Peek through a transparent pyramid and drink in the mountain made of books.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

During World War II, the Nazis repurposed this beer cellar to store stolen artwork.

A crumbling bakery where forced laborers from the nearby concentration camp toiled to feed their fellow prisoners and Nazi soldiers.

From Nazi chemicals to the CIA, this architectural marvel has played a fascinating role in German history.

A preserved college lock-up that recalls a clubhouse approach to discipline.

A tiny chapel clings to a precipice above Germany’s gemstone capital.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

The final resting place of many of Germany's most famous communists.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

No need to strap in for a "ride" on this walkable roller coaster.

Terrifying derelict military hospital once housed a recuperating Hitler.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

This dockworkers' lunch joint has been left leaning by a century of storm floods.

A museum in the building where Nazi Germany signed its surrender tells the story of World War II from the Soviet perspective.

This sprawling Jewish cemetery is one of the largest in Europe.

A portable, wooden replica (minus the hyphen) of Hamburg’s iconic crooked coffee shop.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

An abandoned swimming pool decays on the outskirts of Berlin.