Welcome to the world of cold-weather, northern zoos. Down under in Australia (and places like San Diego) the koalas have much larger, outdoor enclosures.
Welcome to the world of cold-weather, northern zoos, where snow leopards, red pandas and polar bears don't have to constantly fear to die of heat stroke and can actually enjoy real snow in the winter, unlike in some warm-weather, southern zoos...
The picture might deceive some all too hasty critics; the indoor enclosure is quite roomy, and the koalas have access to an outdoor area in the warmer seasons.