Right in front of the Yellow building, nowadays the "Portuguese Center of Photography"
Go in direction to the "Cathedral" of Porto, most commonly known in Portuguese as "Sé do Porto".
There is a statue of a horseman, with the name of "Vimara Peres", look for the guide in front of the horse statue.
Also, we can pick you up at your hotel if you contact us directly.
This is a suggestion, because that day the guide will explain the best option personalized for you.