Portland Saturday Market, outdoors, rain or shine :)--a couple densely packed blocks of vendors, many selling their own craft work. Max stop is Skidmore Fountain, but it will be hard to miss.
Chinese Gardens. These gardens take up a walled off city block. They are very beautiful, but a little expensive ($7 adults/$6 seniors). Still if you want the best of both worlds (to see downtown Portland and Nature's glory all in one day) you can't beat it. Inside there is a little tea shop called the Tao of Tea, which we recommend for tea, snacks and light meals. Max stop is Old Town/Chinatown stop (right before Skidmore fountain, and right after the bridge if you are coming from the East). Get off and walk two blocks Northwest--eh, voila!Powell's City of Books. If you are a literate human being you will kick yourself for missing this place. Coming from the East (that includes the Saturday Market/Chinese Garden area) get off at "the last stop in fareless square" aka Galleria/SW 10th, walk North on SW 1oth .2 miles to 1000 W. Burnside. And if you are a friend of a book lover, but not one yourself, you will find Powell's surrounded by big city shopping opportunities.