Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A plaque on the base of this statue holds a bewitching design.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

What appears to be an ancient Roman temple is actually a Catholic church.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

Drink wine handed out through a window as part of an age-old tradition.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

The oldest operating pharmacy in the world features 800-year-old recipes.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

This 1st-century CE Roman bath sits under a carpark.

International delicatessen has been owned and operated by the same family for more than 110 years.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

A memorial for the mustachioed record-setting runner.

World's largest porcine hairball sits in a collection maintained by Benedictine monks.

The only house in Oregon designed by the famous architect, Frank Lloyd Wright.

Home to the only outdoor municipal elevator in the United States.

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

Approximately 50,000 gallons of water gush from these springs, creating the Metolius River.