Explore 300 years of architecture in historic Annapolis with an architectural historian during a Watermark walking tour to see three types of Victorian homes, Arts and Crafts style buildings, Federal style buildings, and a glimpse of the historic Beaux Arts structures of the USNA. 4-6pm, departs from 1 Dock St., Annapolis, $22 w/discounts, RSVP: annapolis.org.