We are spending 4 days in SMA in Feb. I have read that we can get a local bus which leaves from Calzada de la Luz in SMA to Atotonilco at 10am, 12, 2pm and 4pm and is marked "Sanctuario". This bus passes the entrance to La Gruta on its way to Atontilco. I am questioning this detail- does it stop at La Gruta? Can we pick up the bus again there? I would like to know so we could see both; the sanctuary and the hot springs in one ride, on one day?