Some of the biggest and most exciting studios are open to public tours, but you may be scratching your head at some big name omissions. CBS Television City technically doesn’t offer tours, but there are tons of TV shows that film there everyday for which you can secure tickets. NBC’s famous Burbank studio tour was discontinued in 2012 after most of its productions had migrated to Universal City—notable holdout The Tonight Show fled the lot for New York in 2014. Sunset Gower and Sunset Bronson (the locations of the original Warner Brothers and Columbia studios, respectively) are closed to the public, but you can get a fantastic oral history from the Felix in Hollywood Tour. Similarly, Siren Studios, LA Center Studios and the 20th Century Fox Studios are for serious business only, but the former two host the occasional public-facing festival. And not to stomp all over your childhood dreams, but unless you know an employee, don’t plan on getting inside the gates at the Walt Disney Studios, the Jim Henson Company Lot or Nickelodeon on Sunset (the same goes for their Burbank animation studio).