Battlefield 3 is going to have some very big, very impressive multiplayer maps. One may not be for the first-person shooter player with a fear of heights. Look to Damavand Peak, the base-jumping map, for proof.
The official Battlefield blog offers a design-focused look at three multiplayer maps you may not have seen before (Operation Firestorm, Tehran Highway, Damavand Peak) and one you probably have seen seen before (Operation Metro). Perhaps the most interesting of the batch is Damavand, designed to let players experience serious heights and base-jumping in Battlefield 3.
One of the biggest is Operation Firestorm, a burning oil field that developer DICE says is larger than one of Battlefield: Bad Company 2's biggest multiplayer maps, Atacama Deserts.