Looking to waste a good 15 minutes on the internet? Head over to Koalas to the Max. This “interactive pointless exploration of circularized koalas” is, indeed, pointless — but boy, is it fun. Just be warned: there will not actually be any cute or fuzzy koala bears.
Edit: I stand corrected! Thanks to commenter James’ keen eye, it looks like if you have enough patience to take every circle down to its smallest size, a pixelated image of a koala WILL appear.