The trick spiral
When is a spiral not a spiral? This image shows lots of spirals doesn’t it? It is called the Fraser spiral illusion and there is no spiral at all.
Trace one of the lines with your finger to find out.
In fact, the shapes that you can see are arcs and complete circles. But your eye is tricked by them. If this was a maze, there would be no way in or out! It goes to show that sometimes you need to check shapes carefully to be sure what they are.