William Smith's iconic "map that changed the world" is hidden behind a curtain in the Geological Society building.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A beautifully well-preserved ancient Roman villa.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A glorious pub known for a spiteful printing feud and its famous typeface lost—then found—at the bottom of the Thames.

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

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

The remains of a medieval city loom in one of the most isolated desert regions of Turkmenistan.

Visit a replica of the estate where Aaron Burr allegedly plotted a treasonous scheme against the United States.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

This famed Silk Road oasis was one of the largest cities in the world before it was destroyed by a Mongol horde.

A labyrinthine underworld of tunnels and caverns hides beneath the city.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.

A modern museum dedicated to the fairytales and dictionary work of the Brothers Grimm.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

This Central New York ghost town was once a prosperous railroad community.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

Fans of vintage Vegas, kitsch, and toy pony-based gambling now flock to a casino called The D.

This towering volcanic plug stands out among the dramatic formations that dot this otherworldly desert valley.