Can someone tell me if this has any grammar or spelling mistakes? Thank you!

I visited uncle Ruprecht in Georgia last June and brought back a souvenir poster of the Okefenokee Swamp. I never thought a swamp could look pretty, but this swamp is certainly special. Covering six hundred square miles, it spreads from southeastern Georgia to northern Florida. My poster show silhouettes of cypress trees and pine trees reflected in patches of water. This here swamp a national wildlife refuge contains about 175 species of birds and forty types of mammals, including bobcats otters, and bears.