The enormous flagship for Recreational Equipment, Inc. (REI) has an incredible selection of outdoor gear—polar-fleece jackets, wool socks, down vests, hiking boots, raingear, and much more—as well as its own 65-foot climbing wall. The staff is extremely knowledgeable; there always seems to be enough help on hand, even when the store is busy. You can test things out on the mountain-bike test trail or in the simulated rain booth. REI also rents gear such as tents, sleeping bags, skis, snowshoes, and backpacks. Bonus: The outdoor behemoth offers an hour of free parking.