We can all thank the good people of Cape Elizabeth for their overwhelming rejection of a park admissions fee. Admissions to Fort Williams Park and Portland Head Light remain free to the public.
Admissions fees have been proposed several times; most recently in 1988. The admission fee has been rejected each time.
For some reason, Deborah Fowles at about.com says the park now has a $4.50 admissions fee. Maybe her page is just out of date.