Just over one year ago, I was glued to the television with my gut wrenching for Nik Wallenda's safety as he walked a tightrope across the Grand Canyon. Now, he has another walk planned in Chicago.

On Sunday, Wallenda will tightrope between two skyscrapers in Chicago. Not only will the windy city provide a challenge, but Wallenda will do it blindfolded. If that wasn't enough, the skyscrapers will also provide a 15-degree incline that he will have to walk over.

Wallenda will not wear a harness, or have anything under the rope if he was to fall. For a 360 look at what his walk will be like, click here.

Wallenda's Skyscraper Special will be on Discovery Channel starting at 6:00 on Sunday night.

If you haven't seen his walk from last year, give yourself a half hour scare and check it out!