Cuautla’s best-known balneario is the riverside Agua Hedionda. Waterfalls replenish two lake-sized pools with sulfur-scented tepid water. There are small artificial waterfalls, and activities aimed at children. Take an ‘Agua Hedionda’ bus (M$7) from Plazuela Revolución del Sur. There’s a two-for-one deal on Thursday.
At the time of writing only the private baths (M$250, 8am to 7pm) were operational, due to earthquake damage. Check ahead to confirms it's open.