Places kosmasc Wants to Go

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

This museum in the famously blue neighborhood of Sidi Bou Saïd showcases a traditional Tunisian lifestyle.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This cave system allegedly holds the "metallic library" of a lost ancient civilization.

Was this cave created by Hercules's wrath, the devil, or volcanic activity?

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.

This medieval hilltop village was abandoned at the end of the 19th century, after existing for more than 500 years.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The “Sistine Chapel” of the Middle Ages merges 11th-century science and religion in wondrous hues.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

In northeastern Poland, the ruins of a massive granary overlook the Narew River.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This New York estate was designed to resemble a medieval Scottish castle.

Originally slated to become a luxurious resort, this structure is now a graffiti haunt reclaimed by nature.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

A unique museum dedicated to culture and artistry of carpet weaving.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This modern labyrinth lies in the shadow of a ruined medieval castle.

A submerged archeological park still holds the wonders of a Roman Sodom.