MistRider
While unauthorized stunts are no longer allowed at Niagara Falls, and tightrope walking is limited to once in a generation permits, there are still exciting things you can do if you visit the Falls in person. For example, you could take a ride on the MistRider, and get closer to the Falls than anyone else.
The MistRider is a zipline ride across a section of the Falls. The zipline takes you across the 2,200 feet gap that some crazy people walked on a tightrope, without safety nets. It’s much safer on the zipline, but you get to be as close to the Falls as is possible. It’s definitely worth a go.