Twenty-year effort to raise a castle using tools and techniques from the 13th century is now abandoned in the Arkansas woods.

Where you can photograph wild black bears without worrying about becoming dinner.

The world's largest floating loon bobs in the lake to kick off an annual festival.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

A haunting army of decomposing, moss-covered stuffed animals and dolls guard this swinging truss.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

17,400 lbs., 12 feet in diameter, and 29 years in the making.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

This massive roadside mascot was the first version of the giant to illustrate his butt.

Ever wanted to can Spam?

Half of a waterfall goes into the river while the other half seems to disappear.

This large midwestern cavern features impressive rock formations and an underground waterfall.

These curious caverns have been home to mushrooms, gangsters, and disco.