Rule one of having a secret lair: keep it a secret!
Where better to hide your high tech crime fighting lab? No one would suspect that behind the ordinary book case in the basement there is a gym, laboratory and control center worthy of the most daring hero...or villain. Keep up appearances while wreaking havoc or fighting crime....they wont know what hit 'em!
3 ensuite bedrooms
garage ( parking for your batmobile, of course!)
large game room
Secret Lair which includes a gym, control center, and laboratory
(note: if you dont have Movie Stuff, your sims can use the Lair as additional bedrooms or as an awesome hobby room)