The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

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

A rotating cast of guys and dolls in front of a Washington, D.C. building.

Home to items never before seen by the public.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

It would be a crime to miss it.

Every weekend, people gather here for a brief chance to see their loved ones on the other side of the United States–Mexico border.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

Florida’s half-sized replica of the Vietnam Veterans Wall.

A local landmark with generations of spraypainted messages, and more being added each day.

A former hospital is now home to a pizza parlor and maybe a few ghosts.

This now-deactivated naval base defended the Florida coast for centuries.

A collection of haunted objects and macabre oddities under one roof.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

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

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

FDR hoped to find a cure for polio in this Georgia town's warm springs.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.

One of corporate America's best-kept secrets is also one of the most publicly displayed.