Why walk on this historical site when you can zoom down instead?

Explore this massive series of 45 caves and over 51,000 sculptures carved from cliffsides in China.

The ruins of an ancient temple to the Aztec wind god discovered in the middle of a metro station.

At a museum of everyday objects, it is the act of collecting that is really on display.

Visiting this cacophonous collection of vintage novelties is like stepping into the mind of a crazed toymaker.

Diego Rivera's massive tiled fountain and failed infrastructure project.

The famous artist couple lived and worked here, in two different houses connected by a bridge.

Part bookstore, part café, and part forest.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

Abandoned medieval hill town.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The railway carts travelers to central Athens's highest peak, which offers stunning vistas of the city.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A pair of connected skyscrapers form this symbolic gateway.

The world's first hotel built in an abandoned water-filled quarry.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

An collection of Chinese propaganda posters from 1949 to 1979.