The remains of this 2nd-century Roman temple are incorporated into a modern building.

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

This curious, round temple is the oldest still-standing marble building in Rome.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

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

The yawning maw of this pagan visage is said to bite off the hands of liars.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

In the Compton Hill Reservoir Park sits a statue whose lack of clothing caused a scandal for the group that commissioned it.

Stand at the point where the two mightiest rivers in the United States converge.

From a canyon-like gorge, more than 20 million gallons of water emerge every day, while a smaller spring drips down, creating the illusion of an endless, gentle waterfall.

Some of the oldest exposed rock formations in the United States.

The iconic remains of the original Academic Hall that burned down in 1892.

Rusted and decayed, this former mining site is a portal to the past.

A historic, scenic mill that was forced to close due to overlogging.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

A Mormon place of exile in Missouri.

One of America's first planned communities is preserved in a state park.

Giant works of art interspersed throughout meadows and woodlands offer a new discovery at every turn.

Often referred to as the largest spring in America.

Away from the crowds of fishing enthusiasts, take a hike deep into the woods and journey into an eerie darkness.

Famous church recognized for both its unique design and disciplined monks that live according to the Benedictine discipline.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

A small town garden is dedicated to a psychic dog with the most soulful eyes.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.