Chisos Basin is a beautiful area, located within Big Bend State Park, about 326 miles from El Paso. It will soon be closed off to the public so make your plans and reservations ASAP.
Because of Texas' size it has a very diverse climate and terrain. Texas has plateaus, canyons, plains, hills, and mountains. 90% of Texas is privately owned, so the land can't be explored by its residents. Luckily, Texas does have some great state parks that let you experience all it has to offer.