This was once the center of the Birdman cult, and is now a World Heritage Site.

A 63-foot-tall swinging ball hypnotizes passersby, and proves to any remaining doubters that the Earth is spinning.

A rare set of strings by famed instrument maker Antonio Stradivarius is on display in the Royal Palace.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

Looking for a unifying history, Uzbekistan finds its answer in a 14th Century Turco-Mongol conqueror... despite the fact he wasn't Uzbek.

This "tower of death" has acted as an observatory, a religious hub, and an executioner's lair.

The Avenue of Mausolea is a series of grand palatial tombs.

Light still pours into the ruins of this ancient Islamic observatory.

18m long sarcophagus of a constantly growing dead prophet.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

Final palace complex of the last of 29 Kokand rulers.

Ancient barriers wrap around what was once an important stop along the Silk Road.

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

This enchanting rainforest hotel looks as though it grew from the forest itself.

It's just another skyscraper, but it's shaped like '90s cell phone.

A fantastical and futuristic temple of light built from nine monumental glass veils.

The “City of Stairs” sits high in the Andes, above the world’s largest underground copper mine.

One of the largest ancient geoglyphs in the world is a tall desert god used for predicting the weather.

One of Chile's most active volcanoes is riddled with beautiful caves.

What was once a unique system of urban elevators is turning into a mechanical ruin.

A fantastical group of cliffside stairways, bridges, and twisting paths carved out of stone provide a surreal coastal hike.