Landforms:
* The Edwards Plateau: This plateau extends into parts of Oklahoma and New Mexico.
* The Llano Estacado: Also known as the "Staked Plains," this high, flat plain extends into parts of New Mexico and Oklahoma.
* The Texas Panhandle: This region, part of the Great Plains, extends into parts of Oklahoma and New Mexico.
* The Ouachita Mountains: These mountains extend into parts of Oklahoma and Arkansas.
* The Sabine River: This river forms part of the border between Texas and Louisiana.
Water Bodies:
* The Red River: This river forms part of the border between Texas and Oklahoma.
* The Rio Grande: This river forms the majority of the border between Texas and Mexico.
* Lake Texoma: This reservoir, formed by the Denison Dam, is shared between Texas and Oklahoma.
* The Gulf of Mexico: The coastline of Texas is part of the Gulf of Mexico, which also borders Louisiana, Alabama, Mississippi, and Florida.
Additionally:
* Texas shares the boundary line of the Sabine National Forest with Louisiana.
* It shares the boundary line of the Big Thicket National Preserve with Louisiana.
* Texas shares the boundary line of the Guadalupe Mountains National Park with New Mexico.
This list is not exhaustive, but it provides a good overview of the major landforms and water bodies that Texas shares with its neighbors.
