This large, circular tomb is the final resting place of the first emperor of Rome.

A burial vault located under Tiber Island in the middle of the Italian capital.

One of the most important yet well-hidden museums dedicated to the history of medicine.

An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

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

An oasis of beauty, tranquility and botanical research in the middle of Rome.

This abandoned Brutalist treehouse is a hidden architectural relic.

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

Wandering this ancient burial place offers a glimpse of the afterlife in the fresco-adorned tombs of an ancient Etruscan civilization.

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

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

Geothermal waterfalls in Tuscany.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

Contains some of the world's more disturbing wax anatomical models.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The oldest operating pharmacy in the world features 800-year-old recipes.

The largest and most famous wax anatomical collection anywhere in the world.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The only home of the famous French impressionist painter open to the public is now a museum and bed and breakfast.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

The curiosities and wonders of pharmacy in a delightful historic building.

The only rotating bar in New Orleans has been slowly spinning since 1949.