A more exact name for this might be "iguana cornuda" in Spanish.
If you are coming from the United States, be sure to bring your passport or passport card so you can return to the U.S. Though you can drive a car into Mexico, it is much easier to park in the large parking lot on the U.S. side and walk across the border. Cost of parking is $6.
BTW: This spot is in the USA -- just barely!