Check out the Rose Garden
The experimental roese garden in Washington Park is a great place for visitors. The plagues with all the Rose Queens' names, the views, the scents, all make for a picturesque and memorable spot.
Admission is free, as is parking. In the summer, some nights feature concerts in the bandshell. Take ten minutes or two hours, a walk through the garden will give you a taste of what makes Portland such a delight.