Since we've been on the subject of cats, the above is one of the high points of our recent trip to Nepal: seeing a Royal Bengal tiger in Chitwan National Park. We were very lucky to get such a close-up sighting (the pics were taken from atop elephants); tigers are both endangered and elusive.
UPDATE: I should add that we stayed at Tiger Tops Tented Camp and then briefly at Tiger Tops Jungle Lodge. I recommend them highly, and the Tiger Mountain company in general.