Yesterday in Porto, I had booked a private guided bike tour of the coastline from the port to the mouth of the Douro river. Somehow, I didn't fully grasp what "private" meant. I was expecting to be part of a group. Instead, I had my own personal guide for 2.5 hours, which was pretty cool. I saw more than I would have if I had just rented a bike, with history and context to go along with it. The only downside was the weather. It started raining off and on about a half hour before the tour, so I was pretty well soaked by the end. Oh, and also the cobblestones. Cobblestones everywhere. I was very sore for the rest of the day.