National Park Adventure Tour

“Greetings explorers! Welcome to the National Park Adventure Tour (abridged). Please board the adventure bus in a single-file line. Once you all are seated with your seat belt fastened, we can begin our tour.”

*static & chaos*

“Sorry for the interruption. Unfortunately, our tour bus driver has been kidnapped by Bigfoot. In order to rescue her, Bigfoot is challenging your knowledge of National Parks. Work together to solve the puzzles to rescue our driver so we can begin our adventure!”

Nope, nothing to see here. No glaciers, no hidden polar bears. Just a lovely, white, snowy herring. 
US Postal Service is celebrating the National Park Service's centennial with these Forever stamps!