Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

Europe's oldest still-operational tea farm also boasts a spectacular view.

Berkeley Springs State Park boasts the nation's only monument commemorating presidential bathing.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

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

This ancient market is often referred to as the oldest shopping mall in the world.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A monument marks the location of the first successful steamboat demonstration.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

This claimant to the title of "smallest church in the 48 states" doubles as an equally tiny, quasi-post office.

This rural community has attracted both scientists and techno-refugees due to its federally-mandated lack of technology.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This large, circular tomb is the final resting place of the first emperor of Rome.

Pilgrimage site for star-crossed lovers.

Winding country roads in eastern West Virginia lead to an extraordinary place populated by fiberglass giants.

A giant time capsule not scheduled to be cored until 2040.

This university transit system is a 1970's vision of the future.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

The world's largest fully steerable radio telescope.

The oldest bar in Missouri is hidden within a limestone brewery cellar more than 50 feet underground.