An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

This architectural beauty is the home to a personal collection of more than 600 examples of mechanical musical instruments.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

One of the largest Roman settlements in Portugal.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

This crumbling Portuguese ruin overlooks the populace it once ruled.

This star-shaped military outpost is now simply trying to protect itself from neglect.

Dead weights honor the dead of Portugal's fishing industry.

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

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

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

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

Picturesque intersection of witchcraft and ancient Christianity.

A unique seaside cave where Aleister Crowley faked his own death.

A submerged village appears when dam levels drop.

This small chapel is built of human bones and decorated with a golden skeleton.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

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

Houses are tucked between, on, and underneath giant boulders.