I do not want a Porto visit to feel like a test you can fail. You do not need a perfect reusable kit or a lecture about every taxi ride. The useful choices are simpler: do not drive into the old centre, spend some money with independent places, and remember the apartment windows above the bar belong to someone.
Get to the coast without the car
For a city-to-sea day, take Metro or an STCP bus to Foz or Matosinhos, then walk the waterfront. The route from Foz north toward Matosinhos is a good long walk when the weather is kind; check the coastal route and current transport before setting out. A car is usually more hassle than help there: parking eats time and the walk is the point.
In the centre, group nearby stops and walk when your legs are up for it. Porto is steep, so a taxi or metro when you are tired is not a moral failure. The city’s Tourist Manifest is a decent local reference for visitor conduct.
Spend where the city actually shops
For food, go to Mercado do Bolhão on a weekday or Saturday; it is closed Sundays. Buy lunch or produce from a counter, and leave the aisle clear for people doing their shopping. For a small Porto-made gift, check the current independent businesses in the Bombarda directory or pick up pantry goods at Casa Januário. You do not need to buy a souvenir; one useful thing is better than a bag of plastic you will throw away.
Small ways to be a better neighbour
Keep voices down in residential lanes after dinner, do not block building entrances for photos, and do not point a camera through someone’s window. Take rubbish to a bin rather than leaving it at a viewpoint or on the beach. If your accommodation has a house rule about noise or bins, follow it; the person dealing with the problem may live on the same landing.
How I judge the “green” claim
When a tour or hotel calls itself sustainable, I look for something specific: a smaller group, a named local supplier, a real public-transport option, or a clear waste or energy practice. “Eco-friendly” on a page with no details is just a label. If the business cannot say what it does differently, I would not pay extra for the word.
That is enough. Move around sensibly, pay local businesses for something you actually want, and leave the street as easy to live on as you found it. Porto does not need visitors to perform virtue; it needs visitors to notice other people are here too.
