This medieval church is not only notable for its architecture, but also its connection with LGBTQ+ history.

Architectureal fantasy quarter of Rome.

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

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

A devasting 2020 fire left this historic seminary in ruins.

The crumbling ruins of an abandoned 12th-century monastery.

This chapel is the site of a yearly pilgrimage that originated during the Middle Ages.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

This abandoned five-star hotel is now a five-star urban exploration destination.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

Perhaps the most spectacular grotto along the Algarve coastline.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The giant metal fruit was once the symbol of a large farm.

Come to this Polish museum to take a good, clean look at filth.

This imposing 20th-century castle was abandoned before it was ever completed.

Crosses of all shapes, sizes and colors litter the mountain, the site of a huge yearly Orthodox pilgrimage.

Naturally formed rock city in Poland.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.