An abandoned saucer-shaped monument in the Bulgarian mountains.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

Beautiful antiques and obscure engineering artifacts trace the evolution of phones from rare luxuries to ubiquitous.

From cartoon characters to tiny tanks, a guerilla sculptor's little bronze statues are hidden throughout the city of Budapest.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

Budapest's Communist-era statues, banished to the suburbs.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

Museum dedicated to the terror regimes of Hungary.

Once the home of a hermetic monk, this cave now houses a small church.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

Packed to the ceiling with antique taxidermy and hunting arms.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

The classic Atari game's iconic aliens have invaded downtown San Diego.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

These unique toilets feature transparent glass covered in PDLC film.

This Japanese Manneken Pis gets new outfits for every occasion.

Kawaii meets poisonous at this unique art gallery.

This historical theme park celebrates all things noodle.

Every color in the rainbow awaits.

This spa theme park lets its guests take a dip in pools of coffee, wine, or ramen broth.

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