My favorite Tulsa landmark would have to be the Tulsa Zoo.

Although it has gone through so many changes over the years, it just keeps getting better.  I still remember the old monkey island and the old elephant exhibit.  Feeding the fish and turtles at the entrance has always been a treat.  Having a membership there, helped me get through many days raising my two kids.  It IS the BEST place to take visitors.  Love the Tulsa Zoo!!!!