Las Estacas Parque Natural is a spring-fed natural park in Morelos, known for clear mineral water, swimming, and easy days outdoors. The water rises from a natural spring and flows through a managed reserve with places to float, swim, and picnic.
It is more developed than wild, but that is part of the appeal: it is an accessible family outing in warm weather. Go early on weekends and holidays, when the park can get busy.