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

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

When this former hospital pharmacy closed in 2013 it already looked like a museum, so they turned it into one.

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

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

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

This oddly shaped church resembles a rocket.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.

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

This now abandoned restaurant provides some of the most amazing views of Lisboa.

Located in the thermoelectric factory that once powered the entire city, this Portuguese museum is shockingly fascinating.

Thirty creepy ghosts now inhabit this decaying 14th-century church.

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

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

For more than two centuries, the canopy of this venerable tree has been a haven for songbirds and lovers.

Perhaps the most spectacular grotto along the Algarve coastline.

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

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

A chunk of the "true cross" is held in this small Portuguese church where modern day exorcisms are said to be common place.

Before this rocky hill was home to a chapel, it was used as a lookout by Romans and Moors.