Looking at Porto across the roofs of a few of the Port warehouses and the Duro river.  We took the Port tour at Sandemans (supposedly the best); you can just see the “SA” of “Sandeman” in white letters to the left, backed by the river.  Port has been warehoused here for 250 years and then shipped around the world.  The tour was great, and the price deductible from any wine you bought; and I even managed to get one bottle home.