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

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

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

Historic medieval fortified city in southwest France.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

Treehouse motel and treehouse-building school.

150-year-old satirical tableaus made from stuffed frogs.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

While it is not equipped to peer into outer space this observatory looks like it was built on the moon.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Caves famous for the dragon-slaying saint who lived there.