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.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A small Portuguese cottage formed between boulders in the countryside.

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

A garden in Lisbon filled with giant porcelain creatures.

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

Picturesque intersection of witchcraft and ancient Christianity.

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

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

The stunning interior of this Gothic church is covered in ornate gold details.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

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.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.