The Center of the Universe Tulsa Oklahoma 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.
Tulsa—home to a legendary folk singer—celebrates classic Americana. Things to do in Tulsa include visiting The Gilcrease Museum, Philbrook Museum of Art and The Woody Guthrie Center: http://www.midwestliving.com/travel/around-the-region/tulsa-trip-guide