I've been to St Louis a few times. I was able to go to the Arch during one of the visits and on another occasion stayed down town with a great view of the Arch. The 'Gateway to the West' was completed in 1965 and opened to the public in 1967. It is cool to see when you are driving from the airport to downtown. There's a tram that goes to the top of the arch but I couldnt get tickets the same day, plus, I kinda have a thing with small spaces and heights. If you are planning a visit be sure to get your tickets in advance.