As the Dead Sea continues to deplete, massive sinkholes open along its banks.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A winding path built in secret on the edge of the continent.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

A theme park attraction designed to turn your children into LARPers.

A six-story-tall golden pyramid, surrounded by a moat.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

This striking art museum holds an amazing series of curiosity cabinets.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.