The celebrated eyesore created by starry-eyed sweethearts.

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

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

A surrealist timepiece by the artist of melting clocks.

A collection of haunted objects and macabre oddities under one roof.

A blacklight mini-golf fever dream pays tribute to the iconic rock band.

The palatial McDonald's that inspired Wesley Willis.

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

A hot dog stand where the heads are just as hot as the dogs.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

An enigmatic modern marker left next to a historic Roman site.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.