Most famous work of one of Frank Lloyd Wright's sons.

A common entry point to the Griffith Observatory trail holds its own wonders.

A cooled lava flow from the Haleakalā volcano formed these surreal-looking columnar basalt structures.

Watch the newest land on the planet form before your eyes.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

A sharp sculpture made of thousands of pieces of jagged glass.

Once a resting spot for King Fernando VII.

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

The morbid items in this small and hidden museum are not for the weak stomached.

In memory of The Blur Building, the temporary exhibition pavilion of vaporous nothingness.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

The Swiss artist's bulbous and overgrown shape-shifting sculpture controversially graces the center of Bern.

150-year-old satirical tableaus made from stuffed frogs.

Traversing steep Alpine slopes, this engineering marvel is one of the longest and highest funiculars in the world.

Large Hadron Collider and the Birthplace of World Wide Web.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Remains of a huge radio tower.

This unique abacus hanging in the Technical University of Munich actually tells the time.

This tiny German village has staked claim to being the center of the union following Brexit.