At high tide this strange footbridge appears to have no purpose whatsoever.

The elegant structure of this 19th century railroad bridge creates an illusion of infinity.

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

This abandoned lighthouse looks like a rusting oil rig, but has managed to survive a number of storms.

Tucked away inside a historic Savannah hotel is a hundred-year history presented in ladies' lids.

Two flush headstones mark the only known graves to be embedded in an airport runway.

An eerie smiling woman looms above the granite tombstones.

This haunting tombstone comes complete with a heartbreaking story of love and loss.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.

This quirky curiosity shop takes its cues from the world's bazaars.

Dental instruments from the illustrious history of American dentistry.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

Plundered and left asunder by grave robbers, this ancient necropolis has been painstakingly pieced back together.

Paths are maintained, but trees have taken over plots.

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

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Bizarre Cavern.

A cave on the Maryland border where civilians took refuge during the bloodiest battle of the Civil War.

A Civil War Museum with some notable medical antiques.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

Every year, a Louisiana town remembers a brief Civil War truce inspired by Masonic brotherhood.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.