Nothing can beat the super satisfying moment you finally crack an optical illusion, but it takes a lot of effort to get there. Often, you need to spend a lot of time training your brain to be able to spot the finer details in images, but it's worth it when you get to a high level of eagle-eyedness.
They're proving to be really popular at the moment and in this latest offering, people are urged to find the cute corgi hiding in the garden - and it's much harder than you think. But if you can spot it in 11 seconds, you're a certified genius.
