Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

The smallest post office in the United States is no bigger than a broom closet.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

Less a museum than a bizarre fantasy world created by artists and engineers.

Built following the War of 1812, this fort has withstood hurricanes for centuries.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

Tiny historical streetcars wind through a small scale version of Crescent City in this whimsical train garden.

A pharmacy built in the shape of a mortar and pestle, now resembles a fancy cocktail.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

This huge clock made of flowers and simple machinery was once used a political weapon.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The world's longest known cave system.

Moonbows over Kentucky.