At the eastern end of Fort Pierce, you can take a long walk on the beautiful beach and enjoy the sand under your feet. You can find nice shells at the shore or just sit and relax. If you just want to take a quick walk, you can go on the Jetty right into the ocean, watching pelicans fly by and looking if the fisherman were lucky.
After that, you can go into one of the many restaurants and bars right on the beach.