A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

A diverse collection of wax, bone, papier-maché and mummified relics.

Windblown rock formations in an ancient Roman quarry.

During World War II, this rice mill became a Nazi concentration camp.

A secret hatch containing two parchments was discovered in this statue over 40 years after its installation.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

Every inch of this chapel is covered in craftsmanship from across the world.

This former fascist summer camp was abandoned for decades.

The only museum with its curator—and her pets—buried inside.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

Ancient cave tombs known as the "houses of fairies."

A medieval weapon rumored to have been used by the brilliant poet himself.

Mysterious tombstones thought to be remnants of Atlantis.

A beautifully well-preserved ancient Roman villa.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

Two stone columns flank the grand Venice square, but there were supposed to be three.

An exclusive waiting room built for the royal family in the 1920s is hidden in Milan’s central station.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.