Bentsen-Rio Grande Valley State Park, Texas. As part of the World Birding Center, Bentsen-Rio Grande Valley State Park is a world-class destination for bird-watching. The Rio Grande Valley hosts one of the most spectacular convergences of birds on earth. Almost 500 species have been documented in this unique place.
Rio Grande River, Texas - The river rises from south Colorado to the Gulf of Mexico, is 1,896 ft and 1,250 of the river runs through Texas. The river also forms the natural boundary between Texas & Mexico.