The mysterious Party Yacht Wall on the American River The mysterious Party Yacht Wall on the American River. #secrethistory — at American River Share:TweetRedditShare on TumblrEmailPrintLike this:Like Loading... Related Posts Reddit: I am an artist spending the summer in a shantyboat on the Mississippi River gathering stories of river people. AMA! Engine Solutions, Party in the Lock, River Days, and a 97 Year Old Woman A Brief Visit to Harper’s Ferry and a Mysterious Man A Secret History of American River People Heartland Boating: A Secret History of American River People Cabin Wall Framing. Finally.