I love films like the National Treasure, Da Vinci Code etc. Can anyone name other films like these?

I'm not sure if you've seen the advert but 'Angels & Demons' is out in cinemas soon which has been made and was written by the same people who made 'The Da Vinci Code' which looks really good. It has a twist of a national Treasure film to it as well by the looks of it. iId give it a go =)