Thousands of graves lurk below the surface of this park.

This Connecticut ferry has been operating in some form since 1655.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

The largest hand-carved, outdoor sculpture collection in the state of Maine.

The tomb of one of the greatest travelers in history.

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

A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

A ghostly mansion in the middle of downtown Tunis.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

In the Scottish Highlands, this 13th-century castle ruin is hidden at the end of a farm track.

This cauldron was said to be hidden inside a church after it was borrowed from a local witch.

Beneath an ancient wishing tree lies an underground chapel with 12th-century frescoes and catacombs dedicated to a lady saint.

Spectacular mineral formations fill these caves, which have been used for everything from smoking meat to stashing illicit liquor.

This massive subterranean fissure is known as the "underground Grand Canyon."

This ruined fort and statue are a testament to the last king of Kaua‘i’s savvy diplomacy skills, which briefly brought Russians to Hawai‘i.

More than 100 antique vending machines housed in a used tire shop sell everything from candy to sake and ramen.

This 20th-century replica of a 13th-century castle has itself fallen into ruin.

A folk-art cottage and hotel straight from a Slavic fairy tale.

A grueling 699-step stairway to a heavenly view of the island of Saint Helena.

With no menu and no sign, this 130-year-old taverna doles out affordable home cooking.

A former drinking water storage reservoir transformed into a sunken garden.

A unique Buddhist temple with strange statues, beehives, and dinosaurs.

This magical grotto is adorned with a complex pattern of native seashells, minerals, and fragments of colored glass.