Watch Online Free on Watchseries. Join affable presenter Nigel Marven as he explores El Salvador, the volatile land of volcanoes with a colorful culture and natural history. Follow along as he climbs an active volcano near the capital San Salvador, comes face-to-face with a crocodile, cuddles a caecilian, fights fire with fire, dives deep into a volcanic lake, and discovers the Pompeii of Central America.