This Italian horror movie was especially made for American audiences and even in Italy was released as an American film. While set in Mexico, it was actually filmed in Spain and tells the chilling tale of a group of archaeologists working on a Mayan temple when they accidentally unearth Caltiki, a malicious radioactive mass of gelatinous goo that slithers off to destroy any earthling in its path. Those humans who survive contact with Caltiki become murderous psychopaths