The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

Medieval torture techniques with a modern conscience.

An ancient artistic garden parlor full of hidden water wonders.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This winding road through an Italian canyon may be the most scenic drive in the world.

Walk through a fairytale in Tuscany.

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

One of the largest caves in the world open to the public.

Romans built the world's tallest artificial waterfall in 271 BC.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

This abandoned Brutalist treehouse is a hidden architectural relic.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

A sunken idol welcomes parishioners to Davy Jones' Locker.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.