First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

This Copper beech tree nestled on a nature reserve is host to a bevy of autographs from Irish literary icons.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

This diner's a kitschy dreamland for anyone whose heart is stuck in the 1980s.

This Hollywood dive houses a mural painted by the artists who animated its namesake film.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

A historic holy well hidden near a charming English park.

The building features one of the last remaining free-floating spiral grand staircases in the U.S.

Pilgrimage site for star-crossed lovers.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

At the point of oceanic inaccessibility, you can't get farther from dry land without leaving the planet.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

These ruins of a medieval church are full of architectural mysteries.

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

Ever hear of the Milazzo Cage?

One of the most important yet well-hidden museums dedicated to the history of medicine.

A rather vulgar example of the transition from Latin to the Italian vernacular.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.