With so many people out there taking so many different photos at once, it should come as no surprise that there's a lot of unintentional optical illusions captured on camera. Few of them are actually cool, but when those gems do appear, it's always worth checking out, because it's truly pretty amazing what sort of mind-boggling tricks are being played on us. Even better, these illusions all occur in nature or are completely unintentional, creating a strange work of art that no one could have predicted or planned in advance.

The following images are just a few of the best optical illusions that have appeared online in recent months. They can be anything from funny to interesting to just plain weird. It might take a few looks to figure out what exactly is happening in all of these photographs, but that just makes them extra interesting and a fun way to pass the time. Here are a few of our new favorites.