When it comes to things to do in Porto, you cannot go wrong by visiting the Clerigos Tower, one of the most iconic features of the citys skyline. Get a birds eye view of the entire city from the top or explore its religious history in the Clerigos Church, a baroque style structure that dates back to the 18th century. Climbing the 240 steps will be a challenge for serious hikers, but the view from the top is worth the trek!