The Historic Columbia River Highway is among the Northwest's must-do activities and is my pick for the best visitor attraction in Oregon. One of the first highways constructed for the purpose of scenic driving, the Columbia River Highway began construction in 1913, ultimately running from Astoria to Pendleton through the Columbia River Gorge. Along the 20+ miles that have been preserved for driving, you'll find dozens of waterfalls, magnificent view points, and fun hiking trails. Whether you just stay in your car or you get out and explore, you'll be surrounded by lush rain forest greenery. Major stops include Multnomah Falls and Vista House. Here's my detailed trip planner for anyone anticipating a scenic drive along the Historic Columbia River Highway.