Compared to most of the forts, star- or otherwise, upon which I have trod, Fort Constitution is in pretty poor condition...granted, NHStateParks.org
describes what's there as the "ruins
of Fort Constitution." The fort sits on an active US Coast Guard base, which may or may not be a factor in its semi-decrepit state, but most certainly does
limit one's explorative possibilities.But
only in that one is unable to stroll all the way around the outside
of the fort...which I know because I tried, and was politely but firmly rebuffed. At the fort's miniscule parking area, there are signs instructing visitors to remain on the blue line,
a three-foot-wide trail leading to the fort.