I spent some time in Porto, Portugal this winter. I walked a lot exploring the city, thousands of steps - good thing because I also discovered passion fruit pastries. No numbered city grids in this old old city but a lot of dead end streets. I was hoping to find a spot with a view over the river one day, but ended up in another closed-off alley. It was empty of people and very peaceful. Suddenly I realized that I was not alone and luckily I had my phone camera ready.