Interesting structure video posted by MrDuffy81, a must-see for his followers!

If you are a follower of MrDuffy81 on YouTube, he posted a video featuring a pretty cool structure he found. Even he sounds pretty happy with the find! He didn't show the hike in so I don't know how easy this was to access but if it is pretty deep in the woods, it would be strange for a human to build something this elaborate. Check it out here: