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.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

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

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

The glowing blue Nymphaeum of Emperor Tiberius.

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

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Renaissance villa and gardens complete with a tormented colossus.

Stalactites and stalagmites in a beautifully lit cave.

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.

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

A 16th-century horror show built in a lovely Italian garden.

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

The world's largest secondhand book market is a haven for bibliophiles and bargain hunters.

An eclectic mix of influences rot together in harmony in this India necropolis.

This 17th-century mausoleum is topped with an acoustic marvel.

The largest tiger reserve in India is a vast expanse dotted with ancient ruins of Nagarjuna Viswa Vidyalayam.

This hilltop warren of monastic dwellings is the result of centuries worth of Mongol attacks.

Modest by day, illuminated majestically at sunset.

A centuries-old lookout post still sits atop a natural stone spire.

This ancient Hindu temple is covered in thousands of colorful statues and has a long mythological history.