Nope, that's only the one they've shown so far, which is the first area we'll meet in the game.
Halo Infinite sounds like the most ambitious Halo game ever.
www.windowscentral.com
"the developers stated that while the majority of the game's world is themed around the Pacific Northwest, there will be PNW-themed sub-biomes in the environment. Examples of these will include
marshy swamps,
mountainous highlands, and
war-torn "deadlands" devastated by previous battles. Players will also be able to
explore caves and caverns in the environment, and can also find Banished bases, UNSC Marine holdouts, Forerunner structures, and other points of interest. "