A group in Chicago hikes Mondays, Wednesdays and Fridays around the exhibits in the Museum of Science and Industry early in the morning before museum visitors arrive. One loop equals one-quarter of a mile. Some walkers make the loop once or twice, while others manage to log several miles, learning about interesting subjects along the route. All they had to do was call the museum to make special arrangements. Is there some interesting place, indoors or out, where you’d like to walk? Check it out.