Caltiki, the Immortal Monster
Caltiki - Il mostro immortale (original)
Unos arqueólogos investigan unas ruinas mayas, pero deberán considerar su oficio frente al ataque de un monstruo viscoso.
Starring John Merivale, Didi Sullivan, Gérard Herter, Daniela Rocca, Vittorio André, Daniele Vargas, Nerio Bernardi, Giacomo Rossi Stuart, Gail Pearl, Tom Felleghy
It's a horror and thriller movie, and has a rating of 5.9 out of 10 from Imdb which is fairly okay for this kind of movie.
Watch it here
Not found streaming from Spain.