Skagit Valley tulip fields

Visit the northwestern corner of Washington state during the annual Skagit Valley Tulip Festival in April, and you might think you accidently traveled to the Netherlands. Each spring, millions of tulips bloom, forming rows upon rows of color set against the majestic North Cascade mountain range. You can go and explore the tulip fields, roughly 100 kilometers north of Seattle, for free every year (though it costs around $5 to park a car).