This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

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

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

A collection of objects supposedly singed by the hands of souls in purgatory.

The underground sanctuary of a mysterious ancient cult.

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

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

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

One of seven Jewish catacombs in Rome and one of only two open to the public.

The final resting place of the poets Shelley and Keats.

Monasteries on rock pillars, once accessible only by frayed ropes.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Roam the cradle of the Cuban Revolution with life-sized dinosaurs.

A giant 400-acre preserve in North Florida for displaced wolves.

Former WWI oil tanker played a variety of roles in history, its tantalizing rum-flavored scent being the only constant.

Concrete strongholds stand guard over the Golden Gate.

An artsy hidden staircase leads to breathtaking views of San Francisco.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

Oakland's beautiful monumental cemetery.

Dive bar built out of the remains of a whaling ship.

International delicatessen has been owned and operated by the same family for more than 110 years.

A sunken idol welcomes parishioners to Davy Jones' Locker.