Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

This 'Murder House' grand mansion has starred in everything from Bones to Buffy.

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

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

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

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

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A massive marble foot is tucked away in a small alley near the Pantheon.

This graveyard boasts a medley of diverse and imaginative funeral architecture.

The ruins of an abandoned church mingle with the graves at Oaxaca’s General Cemetery.

This beautifully deceptive waterfall is something far different from what it appears to be.

A mysterious pillar in an ancient burial chamber is said to predict how long you have to live.

The stoutest tree in the world.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

An incredible collection of Mesoamerican art assembled by one of Mexico's great artists.

This amazing collection includes rare stamps from around the world, including fluorescent ones.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

Shop selling 500 flavors of soda has something for everyone.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.