Our cats are strictly indoor-only, but we’ve made exception for them to go out on the deck when it’s nice out, which Martha enjoys a lot. Here she is meeting one of the neighbour’s cats from afar, and possibly learning of the existence of other cats for the first time.
(Our neighbours have an ingenious system for allowing their cats outside without letting them stray out of the backyard, consisting of a rope line over the grass to which the cat’s leashes are tethered, allowing them free reign of the yard without getting any farther than the leashes allow.)