Here are a zoo-full of new screenshots from the next Call of Duty: Black Ops map pack, Escalation, which show off the add-on's four new multiplayer levels; a Soviet zoo, a Cuban hotel, a Russian suburb, and an American convoy besieged by Russian troops.
The new zombie map, Call of the Dead, is still shrouded in secrecy. If you want a slightly more thorough rundown on each of the new levels or want to check out the trailer, check them out here.