A student's perspective
I rode by the Ciudad my second day living here for a semester in Valencia and was blown away... The buildings look amazing with lines and architecture that'll leave you smiling just thinking about it days later. So I would defiantly say everyone has to see it. As for actually paying and going inside to see everything, that's up to you. For entrance into the three sections listed in the other review, it was 29 euros. And for a student traveling Europe, I'd call that a bit much for a two day event... The Oceanographic was beautiful and kinda fun, but the big museum left me desiring I'd brought a little kid with me to play with. There were a couple of interesting exhibits like one on the human genome, but other than that, it was a bunch of activities for little kids. My friends and I joked about having to battle the waist high munchkins to get the chance to see anything... Oh and defiantly don't go Sunday! The only things open in the city really are the museums, so that's where everyone is at! So to avoid the crowds, pick another day!