Where can I get water to freeze? (Minecraft)?

I've been playing minecraft since alpha and stopped playing from 1.6.4-1.8, but I'm playing it again now. But it appears I've missed quite a lot in terms of mechanics of water.

Anyway lets cut to the chase. I'm playing on a realms server and I want to make an ice farm. In what biomes can I do this, or can I just do it somewhere high up where snow will fall on land?

Yes, if you're high enough for it to snow then water can freeze.