Twelve kilometers southeast of San Andrés, a 244-step staircase leads down to the spectacular Salto de Eyipantla, a 50m-high, 40m-wide waterfall. To avoid the steps (and a soaking), you can also enjoy it from a mirador (lookout). Part of Mel Gibson’s movie Apocalypto was filmed here.
Follow Hwy 180 east for 4km to Sihuapan, then turn right to Eyipantla. Frequent TLT buses (M$12) make the trip from San Andrés, leaving from the corner of Cabada and 5 de Mayo, near the market. Car park 'guardians' will ask for money to watch your car and we've received reports that if you don't pay up they'll simply vandalize it while you're gone.