Needles Eye Rock Formation.

The Needles Eye rock formation, Custer State Park in the Black Hills of South Dakota.

Minibus entering a tunnel through the Needles Eye rock formation in Custer State Park, South Dakota.

Trees growing around the Needles Eye rock formation.

The Needles Eye rock formation, Custer State Park in the Black Hills of South Dakota.

The road leading up to & then through the Needles Eye rock formation in Custer State Park.

People walking through the tunnel through the Needles Eye rock formation in Custer State Park.

Alan Morris stood in front of the tunnel that goes through the Needles Eye rock formation in Custer State Park.

Needles Eye rock formation in Custer State Park, in the Black Hills of South Dakota.

Needles Eye rock formation in Custer State Park, in the Black Hills of South Dakota.