A nonprofit foundation runs a reserve for endangered wildlife that's very much worth a visit.
Great for families with kids.
Furesa Adventure is much more than a zoo; it's a 200-hectare (494-acre) nature reserve with endangered animal species from all parts of the world, including Bengal tigers, pumas, various monkeys, and all kinds of birds, all donated by other various countries to try to ensure the survival of the species. It's a little out of town - about a half hour from San Salvador in the municipality of Jayaque - but worth the trip, and all of its proceeds go toward animal protection and convervation efforts. It makes a great outing for families, and besides the critters there's also a fun zipline out here, too.