Depart san cristbal de las casas for a boat ride on thegrijalva river through the sumidero canyon a soaring vertical canyon formed around the same time as americas grand canyon admire the wildlife and the scenic rain forest then visit the magic town of chiapa de corzo the oldest town in the state of chiapas known for its natural beauty and historical significance see centuries old landmarks and the huge tree the town was founded around and gather a few souvenirs before heading back t