Yep, this is sort of inspired by the favorite sci-fi space movie thread, so it may feel a bit related. Anyway, here's my picks: 2001 - That's a no-brainer I don't need to elaborate Silver Streak (1976) - I thought the train crash into the station was beautifully done & directed. And obeyed the laws of physics - the way the train engine was instantly turning all those cement pillars into powder - as such a heavy object would certainly do to stone. Forbidden Planet (1956) - As I mentioned in the other sci-fi thread, this has the fanciest, most epic-looking production design of any 1950's movie. Then 10 Commandments (1956) - The gargantuan parting and uparting of the Red Sea was ferociously incredible-looking and STILL looks decent compared to today's fx. Especially when the Red sea closed, Cecil B. DeMille gave you a real sense of the massive, MASSIVE tons of water folding up over the pharaoh's army. I've never seen "liquid action" handled so epically well in an old movie.