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

Claude Monet was baptized in this lavishly ornate Paris church.

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

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

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

The celebrated eyesore created by starry-eyed sweethearts.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

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

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

A short distance from the Eiffel Tower is the final resting place of several of the city’s more well-known and interesting characters.

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

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

The building where Mary, Queen of Scots was said to have bathed in white wine.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

The most loyal of little dogs, or a Victorian era publicity stunt?

The final resting place of soldiers' loyal canine companions.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Sprawled across the Great Hall ceiling are various constellations and images relating to the zodiac.

This 16th-century house tells the city's history through old artifacts and quirky tales.