This plaque marks the spot where the first crossing guards helped get kids safely to school.

The lowest point in South Dakota and the source of the Minnesota River.

This arid landscape was once a lush wetland. Today, it's a paleontological site filled with fossilized mammoths, sabertooth cats, and more.

This secret gem of a toy store houses a rideable carousel populated with fantasy animals.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

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

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

A unique work of automotive art calls this shopping center home.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

Amsterdam's former hotspot for public executions and dissections.

The history and future of cannabis.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

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

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This bridge was constructed from the rubble of the infamous Bastille.