For this feature alone, FREE charging of your car, it is well worth the annual membership. The Norfolk Botanical Garden is, according to one visitor, the best place to visit in Norfolk. You simply cannot exhaust this absolutely beautiful place. So, charge your car as you visit. I drive a Prius Plug-in and I live about 6 miles away. So, it takes about 40 minutes to recharge to full capacity (1.5 hours if totally empty); that's enough time for a nice walk around the garden. Buy an annual membership and enjoy this feature.