Hidden in the Santa Ynez Mountains off Highway 154, this tiny restaurant once served as a stagecoach stop.

Colorful Native American paintings are hidden within this small cavern.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

Harlequin costumes, signed scripts, and armor-wearing puppets.

This subterranean shrine beneath a bike rental store celebrates the iconic Italian scooter.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

This delightful little museum is dedicated to only one thing: pasta.

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

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

A hospital where antique dolls are given new life.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

Many famous English poets including Elizabeth Barrett Browning are laid to rest at this Swiss-owned cemetery in Florence.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

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

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

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.

An endless sea of white conical domes.

An abandoned outdoor movie theater in the Sinai desert.

This "City of Books" holds a museum, library, and the complete personal book collections of five of Mexico's greatest thinkers.