Sasquatch (Sierra Mountains, CA / Olympic Mountains, WA) - Within the region's dark, tightly packed interior, wildlife is so abundant that it's become the rumored home of an elusive wild creature known as Sasquatch. Many adventurers are drawn to these mountains in hopes of encountering the famed hairy giant, but some confront the monster purely by chance, like Justin Smeja who encountered a family of Sasquatch during a routine hunting trip. Shanghai Tunnels (Portland, OR) - Deep underneath the city of Portland lies a maze of underground tunnels. At one time, they were used for transporting goods between businesses and the Willamette River, but recently the possibility of a far more sinister purpose has come to light. Residents claim these underground chambers remain turbulent from the horrors that took place a hundred years ago and visitors claim to see spirits and phantom wolves. Flathead Lake Monster (Flathead Lake, Polson, MT) - Resting on the edge of the Pacific Northwest region, Polson is a quaint lakeside town with a mysterious monster resident. For decades, people from all around the world have flocked to Flathead Lake in the hope of spotting an elusive aquatic creature living below the surface. Sightings occur every year, dating all the way back to 1889. Skeptics have questioned the authenticity of these sightings, but to those who have seen it, this monster is very, very real.