Explore the wonder of nature in the middle of urban Los Angeles. Experts docents will lead you through the Ballona Freshwater Marsh, where you’ll learn about its history and ecology. Get a special behind-the-scenes look at this protected place and meet some of the birds who call the marsh home. Join the group by the large purple welcome sign on Jefferson Blvd. The Ballona Freshwater Marsh is located at the southwest corner of Jefferson Blvd at Lincoln Blvd. Free.