No wind, not too hot. Perfect day to wander the Bisti and admire weird rocks. Largely unknown to visitors, the Bisti Badlands is a scenic and colorful expanse of undulating mounds and unusual eroded rocks left by an ancient river. It is 4,000 acres, hidden away in the high desert of the San Juan Basin in northwest New Mexico. This area is one of many badlands in the region, the remainder are even less publicized.