From nearly a mile above the ground, the sailplane’s wraparound windows open onto sweeping views of the Wisconsin countryside. Rolling hills and forests, streams, and lakes dot the landscape, and on a clear day, the Chicago skyline peeks out from the horizon. Sylvania Soaring Adventures’s FAA-certified flight instructors pilot guests over these vistas in a fleet of Schweizer SGS 1-26E, Schweizer 2-33, and Grob 103 sailplanes. Towed by a traditional airplane, the gliders reach altitudes of up to 5,000 feet, well above the habitat of endangered birthday balloons. Once released, professional pilots demonstrate basic flight principles, point out landmarks of interest, and sometimes hand over the controls. They also helm training programs to certify students who want to fly solo or pilot gliders for their friends and family.