San Diego has something special to offer for its residents that many folks don't know about. Those who have been in San Diego know that Balboa Park is the real heart of the city with a wide collection of museums. The city established something that they named 'Residents Free Days'. Park museums offer free general admission on a rotating basis on Tuesdays throughout each month to residents of the City and County of San Diego, and to active military personnel and their dependents. You might have to pay extra for special exhibitions or events. This is a great way to get to know the most important museums in the area if you have time during the week. One of the noteworthy museums is the Natural History Museum, a fairly modern museum with a permanent collection as well as changing exhibitions. So you might want to get there more often.