Watch Online Free on Watchseries. The Colosseum Archaeological Park is a natural habitat for wildlife that has transformed it into a unique ecosystem in the world. Here, humans have disappeared, leaving their only trace in the gigantic ruins and the splendid monuments of their past glory. The new empire belongs to nature. The only humans who set foot here, when tourists depart, are biologists and naturalists who monitor the present species, some of which are particularly rare and difficult to spot.