The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

Rumors of the occult haunt this upscale 1920s hotel.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This 13th century Gothic brick castle is the largest in the world by surface area.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

The set location for a 1987 cult classic draws international film buffs to the middle of the Mojave Desert.

Iconic red and white plaques show the creative names invented to navigate the city streets.

One of the few places where you can visit a cenote and Maya ruins at the same time.

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

"Only the devil could play golf here."

Quite simply the largest tree in the world (by volume).

A collection of 20th-century automata, penny arcade games, and musical contraptions.

The embalmed remains of the communist leader lie within a custom crystal coffin.

The once highest point in China blends symbolic design with a kick of adrenaline.

Enormous burial mounds of ancient emperors.

Climb to the top of the world's largest seated bronze Buddha.

The largest known Ancient Egyptian obelisk.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

One of the most well-preserved temples of ancient Egypt.

Ozymandias’ time-keeping temple.

An ancient instrument used to measure the waters of the Nile so Egyptian farmers would know whether to expect famine or flood.