Just north of Echo Lake in Burlington is the serpent effigy discovered by Mary Sutherland. This is the site of the Vortex Woods. The New York Times reported that this "long narrow strip of land, surrounded by a marsh" was the location of several burial mounds. One of these mounds can still be seen and is the "gathering place" of the Vortex Woods tour, given by Mary Sutherland. This is also the site where over 35 people witnessed the UFO during the tour at last year's Vortex Conference.