The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

A spiritual sanctuary in a natural cave.

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

Vast network of air raid tunnels beneath Lombardy's capital.

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

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

An Italian geologic wonder that served as the inspiration for the landscape of Dante's hell.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

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

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

These delicate sand pyramids look like naturally occurring gothic spires.

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

This Italian dam is covered in salt-hungry goats who manage to scale its almost vertical face.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

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

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

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

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

A Milanese café entirely designed by the American director Wes Anderson.

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