The Round Tops look pretty barren in this wintertime photo taken in 1909. In fact, Little Round Top would be nearly unrecognizable were it not for the 91st Pa monument and the 44th NY castle visible on the summit. Note the observation tower seen on top of Big Round Top. The tower was constructed around 1900. My similar now photo was taken during the summer of 2015 so the contrasting foliage is even more stark.