A lot of the time, when someone takes a photo, there is a reason for it. Usually, photos are either self-explanatory or they come with a caption to explain them.

Context is important for many reasons. Context gives a reason for a photo. It answers the who, what, when, why, and how kinds of questions people might have. Context can be a simple title, and it doesn't have to be complicated.

Some photos exist without this, though. Some photos exist online as a kind of abstract art. These kinds of images might be confusing and difficult to figure out, but they are also entertaining and intriguing. These images make people think.

There are plenty of people who collect these types of photos to share with everyone, so that everyone can have a look at some of the world's mysteries. Here are 25 photos we aren't sure why exist, but they do.