Something kind of unique I've found in London:
There are several of them scattered around the city and some of them are quite central. This one was in Vauxhall, a five minute walk from the National Rail station, and in sight of downtown London. It's quite quietly tucked into a mixed neighborhood of social housing, Victorian row houses, and some new office buildings.
These are from the slightly more suburban Dean City Farm:
Every time I happen by one, curiosity gets the better of me, and I poke my head in. Far from rustic, most of them have cafes and lots of places to wash your hands, and the animals all look fat and happy and friendly enough to accept the handouts you can buy from the farm.