A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Stumbling upon this whimsical wooded garden is like stepping into an enchanted forest full of philosophical musings.

Anatomical cabinet holds unexpected treasures.

Visit a secretive crypt before it crumbles to dust.

An old mining site that is slowly being reclaimed by nature.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

Explore the quarry where the marble was sourced for Michaelangelo's David.

The crumbling remains of a 19th-century textile factory.

Nine caves filled with recently-discovered archaeological finds under the houses and the streets of the most ancient district of an old town.

During World War II, a number of important sculptures and paintings were moved to this castle for safekeeping.

A dreamlike medieval church dug into the tuff rock, with unusual carvings and possible traces of the Templar knights.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Water and windows define this defensive Italian well.

This network of roads is one of the most unique Etruscan creations ever discovered.

This 16th-century monastery has been turned into a surrealist architecture compound.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

A gorgeous medieval library where the books are kept in chains.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

An ancient artistic garden parlor full of hidden water wonders.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Natural cathedral designed by Italian artist Giuliano Mauri.

Geothermal waterfalls in Tuscany.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.