This historic Amsterdam bar used to accept sailor's monkeys as payment.

Amsterdam's former hotspot for public executions and dissections.

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

Established in 1638 to battle the Black Death, this botanical garden is a treasure trove of rare flora.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

A beautifully eclectic mix of architectural styles.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

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

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

This unusual elevator doesn’t stop or slow down.

Europe's first floating restaurant is home to a hilarious legend.

This riverside restaurant has been serving customers since 1146.

Each year, Germany's "City of Dragons" slays the world's largest walking robot.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

Turntable anonymously received orphans, alms, and groceries.

One of the most photographed buildings in a city known for its Modernista architecture is an abandoned squat.

An early 20th-century bullring converted into a modern shopping center.

This colorful statue welcomes visitors to a Barcelona park.

This 8th-century Bavarian monastery is home to an exquisite Baroque-era library.

This extremely narrow tenement boasts a maximum occupancy of just two.

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