Can't go wrong with pics of animals...

That tiger pic is particularly good; well done.
I have such mixed feelings about zoos- not much of a life for these critters, even in the best zoos... but on the other hand, my love and respect for wild things was fostered on trips to zoos as a kid- and even museums, where the poor things are stuffed and mounted.
I guess if they're well cared-for and have a little elbow room and things to keep their interest piqued, it's a decent compromise.
And zoos help make people aware that there's a wild world out there that needs our good stewardship.