Western and Atlantic Railroad Tunnel at Tunnel Hill National Register of Historic Places Listing

In 1848, workers started hacking into the solid sandstone of Chetoogeta Mountain. They had no heavy machinery. Instead, they relied on black powder, hand drills, and sheer muscle. Irish immigrants and enslaved laborers did the backbreaking work. They chipped away from opposite sides of the mountain, aiming to meet in the dark center. They did. In October 1849, the two shafts met with less than an inch of error. The 1,497-foot tunnel opened for traffic in 1850, creating the first direct rail link between the Atlantic coast and the Tennessee River valley.

During the Civil War, this damp stone corridor became a major military target. Armies fought desperately over this single stretch of track. Control meant survival. In April 1862, Union spies famously hijacked the locomotive General and ran it through this very mountain. Confederates chased them in reverse. By 1864, General William T. Sherman recognized that the tunnel was the key to his entire Georgia campaign, using it to funnel tons of supplies to his advancing troops. The rebel army tried to destroy it, but failed.

Steam engines kept getting bigger, though. By the 1920s, modern steel giants physically could not squeeze through the narrow, brick-lined opening. So, in 1928, the railroad built a larger tunnel right next door. They abandoned the pioneer. It sat empty and forgotten for decades. Water dripped, weeds grew, and mud piled up inside. Eventually, preservationists cleared the muck and restored the masonry so the public could explore it. Walk through it today. You can still see the thick black soot from Confederate locomotives baked into the ceiling stone.