STS056-109-27 International Amistad Reservoir, Texas, U.S.A. April 1993 The color infrared film in this photograph is best used to map the land-water boundary around International Amistad Reservoir, a dammed section of the Rio Grande just northwest of Del Rio, whose infrastructure is not discernible. The Rio Grande enters the reservoir from the northwest, and Devils River flows into the northeast side. The dam is the thin, white feature south of the reservoir.