It has a look of single-room stone cabin, built of the local river round rocks. For some 70 years it served a single purpose - a shit hole, with pile of excrements of generations of tourist stacking high. Now, it is a historical marker, an architectural marvel in its simplicity and beauty.
I have a collection of pictures of the iron man-hole street covers from Japan, they have their own beauty.
Look around and you will find those, one of the kind, quality made, worn by time and somewhat imperfect marvels, And marvel, you should.