The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

Florence’s mother built a stairway down to her daughter’s coffin so she could comfort her during storms.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A remarkably well preserved tower dating all the way back to the Iron Age.

This 19th-century sugarcane plantation is one of the most well-preserved estates of its kind, including its original quarters for enslaved laborers.

A grandiose octagonal home crowned by a large dome stands out among the antebellum mansions.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

This 11th-century structure is one of the oldest churches in Romania.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

This unique crypt designed by Frank Lloyd Wright for his longtime friend was not completed in either man's lifetime.

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

This picturesque island graveyard is the final resting place of dozens of notorious pirates.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The oldest volcanology research center in the world.

A rare tour of an aristocrat's private home reveals valuable 17th-century paintings from artists like Rembrandt.