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

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

This historic stone bridge has an entire neighborhood clinging to its sides.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

The centuries-old trees lining both sides of this dirt road may become Madagascar's first natural monument.

Vikings and Evangelicals have both had a hand in this replica medieval church.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

This Costa Rican topiary park is a surreal garden of unearthly delights.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

This tumultuous Icelandic lava field looks so alien European researchers want to use it as a stand-in for Mars.

A swing to dangle you off the very edge.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

This uber-quaint Polish village is known for its habit of painting elaborate floral motifs on just about everything.

A massive underwater sinkhole made famous by Jacques Cousteau.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

This enchanting Victorian estate was home to the world's first hydroelectric power generator.

This short pedestrian span is also known as the "Fairy Walking Bridge" because it looks almost magical.

This wrecked airplane has been sitting on a black sand beach since the 1970s.