Summary: You can't drive on it, though, or even walk — the only way to use this officially platted city street is by riding America's one and only municipal elevator. (Oregon City, Multnomah County; 1910s, 1920s, 1950s) (For text and pictures, see https://offbeatoregon.com/1010b_oregon-city-home-of-nations-steepest-street.html)
