Another magic circle

You turn the next corner and come face to face with something familiar. Ahead of you are three branching pathways - left, right, and straight ahead. But between you and any of these choices is another one of those glowing magic circles. You wish you could read the runes running all around the circle to try and get some idea of why these are here, but seeing this circle the second time is just as enigmatic as the first.

You turn around, pondering for a moment if the path you chose at the last intersection just took you in a loop. These winding corridors are just too labyrinthine for you to ever be sure. Turning back around, you sigh deeply. How you got here doesn't really matter now. You just need to figure out what to do moving forward. And for that you need to pick a direction to go from here.