Explore 300 years of architecture in historic Annapolis, the museum without walls, with an architectural historian during this varied and informative walking tour. Highlights of the tour include the Shiplap House, the Paca House, Patrick Creagh House, Hammond Harwood House, and the Chase Lloyd House. 6-8pm, departs from 25 Market Space, Annapolis, $22 w/discounts, RSVP: annapolis.org.