The so-called Center of the Universe in downtown Tulsa is marked by a small concrete circle in the middle of a larger circle of bricks. It’s not much to look at, but looking isn’t really the point
The “Center of the Universe” is a little-known mysterious acoustic phenomenon. If you stand in the middle of the circle and make a noise, the sound is echoed back several times louder than it was made. Even more strange, no one standing outside of the circle can hear a thing. It’s your own private amplified echo chamber.