Photo: GetYourGuideThe slender baroque bell tower of the Clerigos church has soared over Porto since the 1760s, and climbing its two hundred and twenty-five steps rewards you with the finest panorama of the old town and the river. The ticket now includes the church and a small museum. It is deservedly popular, so a timed skip-the-line ticket saves a long wait. Go early or near closing for softer light and thinner crowds on the narrow staircase.