One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The ruins of Theodore Roosevelt's beloved ranch stand in a forgotten corner of a national park named after him.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

The third tallest lighthouse in America once guided author Stephen Crane to safety.

A cemetery housing wild west legends in South Dakota.

The crumbling structure is a rare surviving relic of the area's bygone mining industry.

Yes, this monument is aware that it is about 20 miles away from the actual center of the United States.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

At the time of its completion, it was the tallest dam in the world.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The only road through the heart of Glacier National Park.

New fungal and bacterial species call this deadly lake home.

This erect, phallic geological spire wasn't always named so domestically.

An experimental, automotive replica of Stonehenge.

Despite repeated attempts to make it work, this former mining town is now nothing but dust and memories.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The world-record holder for the longest bridge stretching continuously over water.

The world's largest reflecting pool is just two centimeters deep.

Lady Liberty's original designer installed a little clone in this French fountain.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

The lesser-known lost colony of Roanoke was a safe haven for formerly enslaved people during the Civil War.

So many migrating birds roost on the bridge, it has a special summer speed limit.