This array of large boulders got its nickname well before the battle, supposedly for a large black snake that lived in the rocks.
Union forces occupied Devil's Den on day one of the battle. Confederates from Texas, Alabama and Georgia drove them away by evening, and thereafter used the boulders as cover for sharpshooters taking aim at Federal troops on Little Round Top.
One of the more distinctive and most photographed boulders at Devil's Den.