Instance maps have been added for every instance in the game in World of Warcraft: Cataclysm.
Instance maps are listed based on what expansion they appeared in, with the exception that dungeons and raids which have been retuned for higher-level players can be found at their current tuning level. For example, Onyxia's Lair is currently a Wrath of the Lich King raid, not Classic raid, and Zul'Gurub is a Cataclysm dungeon, not a Classic raid.
A list of every dungeon and raid appears below organized alphabetically, regardless of expansion. Follow the link to be taken directly to that instance's map.