Portland Center Park is a lovely place to take a breather. Enjoy a picnic lunch, throw a ball around or just lie on the soft grass and shut your eyes for a while.
You'll find this recreation and green space in the riverside neighborhood of Downtown Portland. If you're on a budget, you'll be happy to hear that it's free to explore. Throw in nearby sights like Oregon Zoo, Portland Japanese Garden and Oregon Museum of Science and Industry and you have yourself an itinerary for a memorable day out.