This one-hour, behind-the-scenes tour travels more than 100 feet through the spiral staircases onto buttresses, and finally, the roof the world's largest cathedral. Guides discuss the art and meaning behind the stained glass windows as well as the architecture of the cathedral. The tour is offered on Wednesdays at noon and Saturdays at noon and 2:00 pm. Participants must be 12 or over, and reservations and flashlights are recommended. For information and tickets, visit stjohndivine.org.