...and I didn't even have to get arrested!
My image of Alder Lake was selected as one of the seven hidden wonders of Washington State by the Nature Conservancy.
Granted, this wonder is visible from the road that takes you into the most popular national park in the state, so "hidden" may be a relative term.
Pro tip: Alder Lake is a reservoir, so go in the fall when the water level has dropped for a more dramatic foreground. Sunsets here can be spectacular, but sunrise is a bust as a large hill east of this location keeps the lake in the shade for the first few hours of the morning.