The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

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

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

This abandoned Brutalist treehouse is a hidden architectural relic.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

Architectural monsters are devouring this palace's every door and window.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

One of the most controversial statues in Romania is an emperor with no clothes.

This is the oldest Roman-made bridge in the city still existing in its original state.

A forgotten "city of water" underneath the famous Trevi district.

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

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

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