Long Point is a sand spit on the north shore of Lake Erie. It is a Biosphere Reserve, an area where communities combine conservation of biodiversity with sustainable community development. You can read more about that at http://www.longpointbiosphere.ca An older version of the wikipedia page on Long point has an amusing, if decidedly un-encyclopedic take on just how sustainable that development is.
Significant parts of Long Point are privately owned.
Lake Erie is much shallower than the other great Lakes, and a a result, much warmer. The water temperature can reach 21ºC in September.