This subterranean necropolis holds three floors of antler-dug grave caves.

These lesser-known Maltese catacombs date back over 1,700 years.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

Italian cave with exceptional acoustics and an unsavory history.

142 ceramic steps become a mosaic once a year.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

In the sleepy town of Gozo exists a reproduction of the entire town of Bethlehem.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

Ancient mysterious ruts carved in the bedrock.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

Hidden beneath a restaurant, underground tunnels tell the story of Malta’s tragic role in World War II.

This beach-side arcade is believed to be the oldest penny arcade in America.

Final resting place of one of the classic authors of horror literature.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

Rhode Island's tallest building bears a resemblance to the "Daily Planet" building and has been empty for more than five years.

Rumors of the occult haunt this upscale 1920s hotel.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

A 60-room castle constructed by a horse-racing heir.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.