One of Europe's largest supercomputers is housed inside of a disused chapel.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

A temple to modernity, tucked away amid Barcelona's more well known museums.

Turntable anonymously received orphans, alms, and groceries.

This cafe offers a curated collection of treats and tipples made by monks and nuns.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

Bask in the 19th century grandeur of an eccentric Freemason millionaire's private gardens.

Mountain where Jesus was first tempted by the Devil.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This cemetery features modernist statues as strange as its name.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A monument dedicated to a local softball team full of clowns.

The remains of a historic ranch house that witnessed the Civil War battle dubbed the “Gettysburg of the West.”

A famous flea market artist's studio that's full of odds and ends.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

This high desert botanical garden is a unique display of New Mexico’s ecology and culture.

This bird-shaped rock formation defies gravity, time, and classification.

Some 2,000 carvings show this rare desert spring has been an oasis for travelers for over a thousand years.

This popular pitstop lives up to its name.

More than 21,000 images fill this overlooked gem of a prehistoric site.