Portal Park

A netherworld-like dimension lurks within the capital of Ohio. Nicknamed "The Gates of Hell," a drainage pipe is covered in colorful, artistic graffiti under North High Street. Another more gruesome nickname, "Blood Bowl," apparently stems from the urban myth of a skateboarder who met his death while attempting some spiral moves. The tunnel is not open to the public and it can get pretty risky during heavy rains. Explore the area at your own risk! (Submitted by Michael Champ)