American bombs, morbid memorabilia, and graphic photographs tell the story of the CIA-led “Secret War” from the Pathet Lao perspective.

An old quarry transformed into a recreational and cultural space.

An abandoned 6th-century monastery features a medieval map of the known world.

The ruins of the second-largest circus school in the world.

One of the best examples of the modernist movement in Madrid.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

A Romanesque tower appears when water levels drop.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

Of course Salvador Dalí lived in a castle...

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

This cemetery features modernist statues as strange as its name.

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

Only open for two days a year, this church links ancient Greek and modern Christian celebrations.

This memorial to local World War II heroes is slowly being reclaimed by nature.

A piece of stonework relief commemorates the site where the Devil's rage, and odd apparel, destroyed a house.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

The world's largest underwater restaurant is submerged off the southern tip of Norway.

This annual harvest parade features intricate floats covered with fruits, vegetables, and seeds.

The gargoyles and grotesques of the 21st century are here—22 emoji built into a new building in the Netherlands.