65 Eagle Bluff (WI 21)
June 11, 2004 
latitude 45° 10' 7.1" N
longitude 87° 14' 11.6" W

This is as far north as you can get in Door County without using a ferry.  It's located in a very nice State Park (called Peninsula Park), so requires the $3 access fee (which is good for one hour for out of state people)  As built, it featured a 3 1/2 Fresnel lens, but now is a solar powered light.