Go inside to really appreciate this 500-year-old technological masterpiece.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

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

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

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

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

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

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

Ancient snack bar of the Roman Empire re-opened.

This medieval city gate is now a blend of the past and the modern world.

See one of the earliest depictions of a Christian ceremony – with a woman at the center!

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

This collection of neon icons is preserving Arizona's history, one sign at a time.

Enormous photography collection housed in a study center co-founded by Ansel Adams.

The first of the iconic American roadside attractions lives on as a college mascot.

Over 100 miles from the ocean, this ship-shaped building was built in honor of the owner's sailor son.

An off-the-beaten path cave with an underground lake.

A lingering bit of Space Race nostalgia lies in the middle of the desert.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

A maze-like landscape of globular rocks surrounding two Arizona lakes.

This Prescott institution is widely considered the oldest bar in Arizona.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.