Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

This replica Viking village was created for a film that was never shot and is now open to visitors.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

One of Ireland's most infamous prisons for rebels including men, women and children.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

The steepest classic funicular in the world glides along a dizzying incline.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

The site of the first battle of World War II.

One family's environment-friendly hobbit-house in Wales.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This Scottish manor house is a lush relic from the life of a literary great.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.

The massive cave church of Cairo's Zabbaleen community is one of the largest Christian churches in the Middle East.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

The attic of a four-century-old canal house hides a clandestine church.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This unattributed sculpture in Amsterdam is hiding in plain sight.

A beautifully eclectic mix of architectural styles.