A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

This ruined castle is said to be the legendary keep of a Viking princess.

Other-worldly rock formations and ancient fossils abound in this unique stretch of Nebraska badlands.

Toss a Frisbee through the ruins of this Colorado gold mining town.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

Moss and stone turn this waterfall into an otherworldly liquid veil.

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