Skagit Valley Tulip Festival
The Skagit Valley of Washington state is the largest commercial bulb production area in the world outside of Holland. Thousands of acres are devoted to the growing of tulips, narcissus, iris and other spring bulbs. The flowers supply the local (west coast) cut flower industry and the bulbs are sold directly to consumers as well as being exported to Holland for sale throughout the world! Each year in April, the Valley is host to the annual Skagit Valley Tulip Festival, which attracts over a million visitors each year.
While there are a number of excellent display gardens that show the bulbs in a garden setting (all nicely labeled), what is absolutely breathtaking is seeing the expanse of field grown tulips in full bloom, acres and acres of them in stripes of vivid color. I've linked to a video of a recent festival for your enjoyment.
Here is a link that might be useful: Skagit Valley Tulip Festival video