This inn of the court provides a fascinating window into London’s legal and architectural history.

This restaurant sits within the walls of an 18th-century fortification that once defended the city’s old quarter.

This skewed English house has looked like it's going to fall over for centuries.

This hidden garden boasts amazing views of Lyon.

The naturally mummified body of a peasant girl saint.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

Abbey built on the ruins of Roman catacombs.

Inspired by Thomas Stothard's painting of the "Journey to Canterbury," albeit with Canterbury natives.

Enormous, fluffy dogs frolic around this museum dedicated to a legendary Saint Bernard.

One of England's most famous churches hides a pair of little known architectural treasures.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

Grab a life-changing ham sandwich at this former horse butchershop.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

This modest marker near Notre Dame identifies the very center of Paris.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

A surrealist timepiece by the artist of melting clocks.

The first green space constructed on an elevated viaduct.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

A constellation of golden cobblestones shows the names of local children born under a full moon.