Sprint to the Hoyo Azul sinkhole the second the gates open; that neon water turns murky with crowds by noon. The water-landing ziplines deliver the best adrenaline hit, so skip the filler cultural walks if you are short on time. Bring a waterproof phone case to dodge the $30 photo fees and pack your own snacks because the park cafeteria is overpriced and mid. Four hours is plenty here. Don't waste your energy on anything else.
