Coyote Peterson and the Brave Wilderness team take kayaks to an island off the coast of Maine, where an abandoned fortress from 1858 now displays a sign reading, "ENTER AT YOUR OWN RISK."

"There's always a chance that something interesting can be found," Peterson testifies as they approach Fort Gorges. Upon entering the huge castle, he exclaims, "It feels like Indiana Jones and the Temple of Doom!"

Check out the video above, gone viral with more than 3.1 million views. Find out out what Peterson means when he observes, "It's like a whole ecosystem," and discover how you too can visit this wild place!