The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

One of the world’s smallest bars, just 13 square feet, is brimming with speakeasy flair.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

This once-derelict building is now one of the most beautiful bookstores in the world.

A lake with hundreds of ancient skeletons surrounding it. The surprise is what killed them.

Stay at this storybook estate, featuring Sir Henry Hudson Kitson's masterpiece "Gingerbread House."

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

This attraction was abandoned after the Chernobyl disaster.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

This wondrous waterfall rushing down a green-covered mountain wasn't discovered until 2010.