Pics come in many shapes and sizes, and even types or themes. From funny memes, to cool historical photos, there is basically an endless supply of whatever your preferred type is. In this selection of pics, we have some that may be a little tricky at first glance to figure out exactly what is happening but don't worry you're not alone in the struggle.

So get your thinking cap on and grab your glasses if you wear them as you may have to do a double take to understand what is really going on in this batch of photos that almost double as optical illusions.