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

Iron Age runes and ruins hide in plain sight along this Portuguese beach.

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

Rainwater transformed this old quarry into a peaceful pond you won't find in most tourist books.

The best place in the world to buy tinned fish.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

An honorary saint of the people, Maria Adelaide became an incorrupt corpse, the clothes intact, exhaling “a strong scent of roses.”

One of the largest Roman settlements in Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

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

This crumbling Portuguese ruin overlooks the populace it once ruled.

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

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

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

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

A small Portuguese cottage formed between boulders in the countryside.

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

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

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

A submerged village appears when dam levels drop.

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