The aqueduct opened in 1842 and apparently was in use until the 1950s. On one side of the trail are old mansions, most in decrepit condition and on the side nearer the river are rows of brick apartment houses.The trail is beautiful and feels a bit incongruous, given its surroundings. See what you think. By the way, the first day we walked some of the trail, the day was brilliantly sunny so the light through the trees was dappled. Today was hazy. Both days lovely, but the light so very different.