this otherwise admirable UK Follies Home Page doesn't mention the only one I've ever got to spend any time in, The Hermitage in Dunkeld, Perthshire, visited in 1992, which also has an Ossianic poet's damp hutch nearby. The Hermitage above naturally amplifies the waterfall sound from below for a quick submersion into the Sublime. The landscape/reading/picturesque connection so clear over there, whereas here you can never be sure...