Tap into this city's colorful seafaring history with a visit to the Maritime National Historic Park, near Aquatic Park. Besides a museum packed with interactive displays, the park's visitors center offers an opportunity to listen to sea chanteys, read a sailor's personal journal and check out vintage equipment. Free. 499 Jefferson St.; (415) 447-5000, http://www.nps.gov/safr/index.htm. View San Francisco Maritime National Historic Park in Google street view.