The Fountain, it's one of those movies that just absolutely blew me away and I had to have it but I'm just never quite in the emotional state to revisit yet I still recommend. It's breathtakingly beautiful and devastating. What Dreams May Come is a very close second, but I feel like after Robin Williams' death it's even more so, but the movie itself is just so beautifully done and heart wrenching.
I loved the fountain, too. It is so incredibly beautiful, and I'm glad to own it for the same reasons. I also can't imagine when I'll want to watch it again...