This Parisian café sticks almost exclusively to an ethos of reuse.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

A treasure trove of scientific instruments from the 17th and 18th centuries.

Where two rivers meet—but don’t mix.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

The curious underground history of keeping Paris clean.

This 400-year-old tree is actually an immigrant from North America.

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Meant to be a lavish presidential home, the palace became a symbol of the fall of South Vietnam.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

This otherworldly French waterfall looks like its waters have turned to stone.

Since ancient times these picturesque springs have been providing bathers with healing waters.

Traditional Danish spot where the schnapps are flowing and the smørrebrød is loaded.

Denmark’s oldest bakery is home to the 'Wednesday Snail,' one of the best cinnamon rolls on the planet.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

A futuristic rocket marks the spot where three borders meet.

The most impressive of Basel's three remaining city gates.

An unassuming Swiss institution houses Europe's largest toy museum.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.