Countless stories attempt to explain Poland's mysterious J-shaped trees.

This massive underground salt mine now holds a sci-fi theme park in its depths.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

This odd Chilean waterfall-cano hotel must be entered via a rope bridge.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

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

Lavish royal estate punctuated with heated greenhouses.

A majestic lion statue guards this Parisian botanical garden, and feeds on an unsettling item.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Australian Lake set aglow by Noctiluca Scintillans.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

An ethereal glowing blue ocean cave in Croatia.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

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

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.