 The Nestlé company constructed a large milk processing plant in the center of the ruin in the late 1960s, removing Mound 17, one of the major ceremonial mounds at the site.In recent years, the Instituto Nacional de Antropología e Historia (INAH) has purchased sections of the site from local land owners.INAH officially opened a small portion of the ruin to tourists on December 8, 2009.