A fortified palace in the shape of a ship on the Thiou river.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

A massively oversized measuring tape sculpture sits inside a hidden yard.

Visitors dating back to the 1600s carved their marks in the stones of the iconic tower.

An image of the legendary saint stands in the shadow of a cathedral she liberated.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

A neighborhood church's unusual abstract stained glass was the final project of avant-garde artist Jean Cocteau.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

The castle was reconstructed to fit Kaiser Wilhelm II's romanticized vision of the Middle Ages.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

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

The world's largest reflecting pool is just two centimeters deep.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

A Gothic cathedral created from volcanic rocks.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A line number in Amsterdam that will likely never be used again due to its tragic history.

A floating cat sanctuary on an Amsterdam canal.

A nomadic museum known for its art exhibitions about religion and faith.

Amsterdam's former hotspot for public executions and dissections.

The house of a former Argentinian president stands protected within a large glass case.

A bright little alley in La Boca is a part of tango history.