From the anchors atop Sirenos Crack, traverse right for about 15 feet and climb up to some small ledges and a short pillar. You'll find 3 different cracks diverging from here. Follow the one in the center till the top of the headwall, going from fingers to hands.
DESCENT: A 35m rappel puts you back on the belay ledge (70m rope only), or scramble up and left going behind a big boulder to reach the big ledge atop Viaje Magico and follow the rappels for that route.
This route starts from the belay ledge atop Sirenos Crack.
Standard rack up to #2 Camalot (doubles from finger to hand sizes), nuts.