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

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Ruins of a 10th century church tucked away deep in a botanical garden.

An Italian hillside ghost town.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

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

2300-year-old Roman road connecting the empire.

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

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The underground sanctuary of a mysterious ancient cult.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Renaissance villa and gardens complete with a tormented colossus.

Thousands of well-dressed mummies below a monastery.

Architectureal fantasy quarter of Rome.

Pompeii's less famous neighbor is still revealing her secrets.

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

An alchemist's "magic door" stands in the middle of a Roman park.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The world's largest collection of preserved trolleybuses.

This Cheshire museum has cuckoo clocks, a rare pipe organ and vintage motorbikes. But mostly cuckoo clocks.

These medieval tunnels provided water to the city above through centuries of civil war and plague.