Portland is more than Powell's Books and Voodoo Donuts. Here are some other awesome things to check out.
Portland, Oregon, US
A sense of firmness // TR10: Green Concrete - MIT Technology Review
Limestone caves - South Australia
Portland Tourism Association Things to do in #Portland Enchanted Forest
Portland Tourism: TripAdvisor has 181,317 reviews of Portland Hotels, Attractions, and Restaurants making it your best Portland resource.
Portland Tourism: 150 Things to Do in Portland, ME | TripAdvisor
10 Things to Do in Portland in 24 Hours - The Lemon Bowl
Hostels can be Eco-Friendly Too! Sustainable Tourism with Hostelling International in Portland, Oregon
Portland Tourism: 656 Things to Do in Portland, OR | TripAdvisor