Today tillyjane and I went hiking at White River Falls State Park, on the advice of ramblin_phyl. It's a beautiful little park in a small canyon, which features an electric power plant built in 1901, expanded in 1910-1911, and abandoned probably sometime after WWII. The walk down to the power plant is a short, steepish trail with good footing in dry weather.
Power House Interior
As usual, more at the Flickr set.