You're invited to the 2nd annual Doors Open Madison event taking place on Sunday, April 23rd from 11 am-4 pm. This free, one-day event is a chance for the public to explore Madison's built environment. Over 25 buildings throughout the downtown area will be open for tours with additional entertainment and kids activities taking place throughout the day. Similar events have taken place in over 50 cities around the world and last year's inaugural event in Madison was a huge success. For further details including an event map and a full list of building sites, visit doorsopenmsn.com!