Portland has the most unique collectable store. It is called Portland Pop!Train. It is the world's only collectable store on 16 wheels. The store was originally a 1948 Milwaukee East railcar, in 2021 it was transformed into a Portland-area Pop Culture Store:
And it has cool stuff inside:
Portland Pop!Train is the coolest collectable shop that I have ever been to and I am glad I got a chance to see it.