Come for the boats, stay to explore the intriguing assortment of art.

This church carved into the rocks is full of enchanting stone statues.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

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

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

A retired subway car stands alone in a field in the middle of Queens.

These legendary stone steps were once used to haul coffins up the rockface.

This lonely rock has been turned into a character loved and feared by children.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

Local legend says Isaac Newton built this footbridge without any screws, bolts, or nails.

One of the few surviving examples of the first lock and dam system built on the Ohio River.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

This retro underwater observation tower would make the perfect lair for a sea-loving villain.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

The fairy tale castle of the "fairy-tale king."

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

An eccentric inventor's castle home with its own indoor weather system.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

Ruins of a historic medical facility sits eerily by the water.

These aggressively sustainable art homes look like something out of 1970's science fiction.

A little-known ruin with a convoluted history and a fascinating latrine drainage system.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

Legend says this tiny ancient island is the lost ancestral homeland of the Aztecs.