A mysterious castle built as a monument to lost love.

The failure of one component toppled this entire bridge during rush hour.

The largest earthwork effigy in the world.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

Walk the whole Mississippi River!

Home of an evil witch famous within southern folklore.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

In 1967, murder and mayhem disrupted the tranquility along this quiet stretch of Old Route 66.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

The southernmost outpost of the Russian Empire in colonial America.

There aren't too many operational funiculars around, but Pittsburgh has two!