46 Milwaukee Breakwater (WI 41)
June 11, 2004
latitude 43º 1' 37.2" N
longitude 87º 52' 55.3" W

Theoretically only accessible by boat, but, if the weather's fine, and you have a long lens, you can see this from the pierhead shown above.  (On our previous visit, you could not see across the harbor, so it's not that close, but close enough.)