How do you get to arkham asylum in Lego Batman

to get to the arkham asylum you must go left into the main batcave and go to one of the computers that has a lever next to it. pull the lever and you will be teleported to the asylum. there, you will be riddler with your new companion, Clayface. Once your there, explore a little until you find the level room. there, you can play the villan levels. only if you've complete an episode of the hero levels such as Riddlers Revenge, Penguin, and return of the joker.