I've seen the movie version of the documentation series
"Planet Earth" yesterday and found it very impressive and moving. I encourage everyone to watch it - I think it's important to remind ourselves of the beauty of our planet, and the responsiblity we have for how we treat the world. It's easy to forget about that in everyday life, where you're more worried about things like money and other artificial concepts.
Also, it provides everything you could want from a movie: beautiful pictures, funny and heart-warming moments, sad moments, tragedy and satisfaction.
I don't know whether this runs in US cinemas, but I found the original series
on DVD (no affiliate link). I think this would make a great present, too. If you have kids, watch it together with them. It's a great favor you can do for them and the world.