The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

This fortress in Honduras was built to resist pirates, but its builders had more to fear from the British.

The saltiest lake in all of Crimea is also the pinkest of the pink and teeming with life.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

This unique railroad museum secretly contains the history of Poland rebuilding itself from the inside-out.

A walkable map of the world, made from soil and stone by one man.

This half-finished "city of toys" was almost Italy's own Las Vegas.

The beautiful baroque library of the Hapsburg empire.

Two women with a flair for both adventure and artful clutter created this singular round home.

This former quarry is now a picturesque gorge that hides a sunken lake.

This black shoreline is made up of exploded lava particles.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

This magnificent Crimean estate was once a playground of the Russian elite.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

Hidden deep in the Guatemalan jungle is a turquoise paradise of natural pools, caves, and waterfalls.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

Extraordinary sculpture garden created by an eccentric English poet.

A palatial sculpture park was built illegally and in secret by a self-taught artist over 36 years.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.