Another favorite from Big Bend National Park and used in Big Bend Vistas and now as a postcard is this view of Casa Grande (7,325 feet) from the Tree Zone Exhibit at Mile 4.3 on the Basin road. The madrone tree, Arbutus xalapensis, on the right is one of several that grow in Green Gulch.
The cliffs on either side of the road are part of the enormous Chisos Pluton, a granitic intrusion. A half-mile ahead, the road goes through a narrow gap between jagged pinnacles of the pluton on both sides of the road.
