Visitors will now have access to a 2,200-foot tunnel that runs beneath the Niagara Falls' cathedral of power and takes them on a tour of its 115-year past. The tunnel, which was constructed in 1905 on the Canadian side of the Niagara River, was used to outflow water and generate electricity for upstate New York and Canada from 1905 to 2006. You can travel down the tunnel in a glass-enclosed elevator. Then for a breathtaking panoramic view of the falls, stand on the viewing platform at the brink of the Niagara River and immerse yourself in the surreal experience of tranquility and grandeur.