Gladys Porter Zoo is an zoological and botanic park in Brownsville Texas.
Palo Alto Battlefield National Historical Park in Brownsville, Texas is an unincorporated National Park Service unit.
Laguna Atascosa National Wildlife Refuge protects the largest natural habitat area in the Lower Rio Grande Valley.
The Sabal Palm Sanctuary (a nature reserve of 557 acres and bird sanctuary) is located in the Rio Grande Valley,
Fort Brown, a U.S. Army military post located in Cameron County Texas, was established during the late 20th century