Mario's Tunnel of Doom

"'Oooh...Mario's Tunnel of Doom. Very scary'—Mario Head"Mario's Tunnel of Doom is a very scary tunnel owned by Mario. Said tunnel is haunted by spooky ghosts and monsters, such as a copy of Terror Weegillo, some spawns of Giygas and Ghosteemee. It's very dangerous to wander into the place and caution is advised. There are some rumors about a very precious artifact hidden in the middle of the tunnel, although the rumor wasn't confirmed, since no one really could get pass the spooky ghosts.