A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

Now home to a drinking establishment, this building has a macabre history.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

This 16th-century house tells the city's history through old artifacts and quirky tales.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

A sculpture dedicated to the Roman history steeped in a Scottish town.

This Scottish bridge seems to compel dogs to leap to their death.

This seaside Scottish holiday rental lets you live out your bookselling dreams.

This museum is home to 22 panes depicting skeletons dressed in colorful garments.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

A beachside cave filled with Bronze Age metalwork, pottery, and human remains.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

The great Italian Renaissance painter was laid to rest here in the Chapel of Saint-Hubert.

A 2017 crowdfunding campaign saved this historic castle from being destroyed.

A huge Megalithic chamber tomb located behind a cafe.

A lush indoor jungle fills this bustling Madrid transportation hub.

This 7,000-year-old megalithic wonder covered by a Franco-era reservoir emerges in times of drought.

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

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

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

The discovery of this Neolithic settlement, which contained a Stone Age "cathedral," threw archaeologists for a loop.

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