In 2017, a 'Welcome to Twin Peaks. Population: 51,201' sign popped up at 41471 SE Reinig Road in Snoqualmie. It's not the original that appears in the series, but it's such a draw for fans that it's already been stolen several times.
Nevertheless, last time we heard, it was still there in late 2019. If nothing else, head to this part of town to see that iconic opening credits image of the moody and decidedly un-twinned peak of Mount Si.
The mountain, a key landmark in the mythology of the local Snoqualmie people, is well worth a visit with a number of popular trails winding you through its dense forest (try WTA's guides). And yes, there are owls. They have eyes.