Bubbling up from deep underground is the warm crystal clear water that fills the Warm Springs Pools, America's oldest spa.

This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

A wondrous old library overlooking the nation's capital.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

Every drop of D.C. tap water flows through this old waterworks.

An eerie smiling woman looms above the granite tombstones.

This historic oak tree has been around for over 300 years and might last for 300 more so long as it doesn't fall apart first.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

A vision of beautiful Hindu architecture in the middle of the American South.

Ruins of a Carnegie family mansion on Cumberland Island.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

A rapidly disappearing authentic bit of the old south.

The remains of a chapel created for convenience.

Oldest unrestored plantation house in America that is open to the public.

One man's extraordinary topiary garden in a small South Carolina town.

One of the oldest living oak trees in the Southeast.