Cerro Castellan Window in Big Bend National Park, Texas
Photos by Jay Wilbur and Danny Horowitz
NABSQNO 13R-645861-3226131. Cerro Castellan Window is a fin natural arch eroded through a volcanic dike. It is located along the Castolon Road in Big Bend National Park, Brewster County, Texas. It has a span of about 6 feet.