France's most famous cemetery, with some of its most curious tombs.

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

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

The celebrated eyesore created by starry-eyed sweethearts.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

2300-year-old Roman road connecting the empire.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

An avant garde art museum at the University of Chicago.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

This abstract sculpture is rumored to cast a hammer-and-sickle shadow once a year.