Famed tightrope walker Nik Wallenda crosses 200 feet over an oceanfront highway in Sarasota on a wire without a safety harness or net.
Sarasota, Florida -- Daredevil Nik Wallenda is taking his final practice walk before his very dangerous stunt Sunday, when he will tightrope walk across the Grand Canyon!
He'll be doing the quarter-mile walk without a safety harness.
Wallenda's final practice is Wednesday evening at 6 in Sarasota's Nathan Benderson Park.
Earlier This Year: Nik Wallenda's Skywalk over Sarasota
Currently Wallenda holds six world records, including one for being the first man to tightrope walk across Niagara Falls.
Sunday's Grand Canyon walk will be broadcast live on Discovery Channel, beginning at 8 p.m. ET.