Science EverywhereTravel & places Pit 91 at the La Brea Tar Pits by Eva Amsen August 17, 2008 by Eva Amsen August 17, 2008 Pit 91, originally uploaded by Easternblot. This is Pit 91 at the La Brea Tar Pits. Visiting the pits is one of many geeky things I did on my recent … 5 FacebookTwitterPinterestEmail