My husband, our two kids and myself are going out to Iowa in September! I was wondering if there are any letterboxes along I-80, or not too far from it, that are must grabs. Anywhere from Pennsylvania to the Des Moines area of Iowa. We're going about 40 miles west of Des Moines to Stuart.
We will also be going to Winterset to see the new John Wayne Museum!
Thank you to everyone in advance!

Yes, there are! How much time do you have for stopping along the way?

We want to stop a few times along the way. My husband is going to take two weeks off so we're taking our sweet time. Lol