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

Along this wire fence, travelers have been leaving a particular memento since 2012.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

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

Three columns of volcanic rock shoot out of the ocean.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

Despite its grandiose name, this enigmatic first-century void under the town is no cave, and it's possibly not a palace either.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

An archeological treasure trove stumbled upon by a couple of children.

Giant topiary dog once played a role in a terrorist bomb plot.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

The extensive relics of an ancient Roman and Phoenician fish processing plant hide in a town park.

Seaside ruins of a settlement that date back to the first century B.C.

This beautiful spit of land was once the summer playground of the king of Spain.

A living art gallery painted on a canvas of Monterey pine trees.

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

This 19th-century fountain's namesake animal isn't what you think it is.