El Potrero Chico (“little coral”) is the world famous big wall sport climbing paradise in northern Mexico. It is an amazing climbing experience of a lifetime of well-bolted, multi-pitch sport routes with ratings from 5.7 to 5.14 and routes with up to 23 pitches.
The geology/archeological museum of Mina, a short drive from Potrero Chico (30 min?), features wooly mammoth bones excavated in the desert nearby as well as many different periods in Mexican history.