Must see at the Volcano park! Thurston Lava Tube is a very large unique tunnel located a few minutes from Crater Rim Drive. This is an attraction that anyone in your party can partake in. The tube provides you with access to the inner workings of lava flow. It is cool to see the formations created when lava met rock hundreds of years ago and the formations that have generated over the years since. The tunnel itself is well lit and easy to navigate. It can be slippery at times so take precaution. Should only take 20-25 minutes for the entire trip.