Artist James Turrell's ode to dawn and dusk on the campus of Rice University.

A taste of Middle Earth, in the middle of the Bayou City.

At the "Garage Mahal" in Houston, car culture is about more than just driving.

Beer lover's can-covered house.

Banished from town, this local jester concocted a clever return.

Two stunning 17th-century libraries and a cabinet of curiosities.

This amazing 15th-century mural remained hidden in plain sight for centuries.

The Grand Mall in Varna hosts one of the biggest collections of Soviet-era paraphernalia in Bulgaria.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A collection of art from Bulgaria's time as a communist state.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A window into a long-lost world, these colorful tiles advertise a long-defunct range of purgative teas, harmless smokables, and diarrhea cures.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

Known as the Casa de las Siete Chimeneas, this haunted 16th-century manor has a dark, mysterious past.

The earliest known map to show America, discovered by accident at a Paris bookshop.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

A striking public sculpture representing the period of martial law in Communist Poland.