Where should I go in Africa to see wild lions?

This question probably sounds really stupid, but I've been interested in going to Africa for ages. The thing is, I want to go because i want to see wild lions, crocodiles, zebras, giraffes... But I can't just get on a plane to Africa and expect to land somewhere where I can see them! Where in Africa would I need to go? people say 'The Bush', but i can't get on a plane and land in 'The Bush'!! Please help, thanks!