I spent a couple of days in Pendleton and stumbled upon this on Yelp. Just a heads-up, you'll need to book a reservation because the groups tend to fill up quickly--we had 17 people in our group! This was definitely more than we were expecting! The tour was about 1.3 hours long, and you'll need to climb and descend stairs and squeeze into small spaces. If any of that sounds like a challenge, it might not be the right fit for you. Our tour guide was "BRAD," and he was amazing! He's practically "been there, done that." He grew up exploring these tunnels with his friends and has all sorts of stories to share. You'll learn a lot about the history and some simple sayings that will make you laugh and give you a deeper understanding. For example, there's a "Shoot" of whiskey! From the outside, you have no idea how huge this place is, and we only get to see a small part. Don't miss out if you get the chance. We'd definitely go back and bring a friend who hasn't seen it before. read more