Gaze at Gilded Age mansions, stroll lakeshore paths, and more in Lake Geneva, Wisconsin.Credit: Travel WisconsinStay at the Grand Geneva Resort & Spa, a storied property with golf courses and a ski hill.Walk along the Geneva Lake Shore Path to view Gilded Age homes and bucolic scenery.Visit Yerkes Observatory, the birthplace of modern astrophysics.Dine with your feet in the sand at Pier 290, set on its own beach.Experience a different side of La…