The holder of half a dozen world records will walk across the Grand Canyon on a steel cable with nothing but the Little Colorado River 1,500 feet below on June 23. With no tethers or safety nets, the walk will be the highest tightrope attempt ever for the 34-year-old, at a height taller than the Empire State Building. Last year, Wallenda, a seventh-generation member of the “Flying Wallendas” family of acrobats, became the only person to walk a wire over the brink of Niagara Falls. Photo: Nik Wallenda walks across a tightrope 200 feet above U.S. 41 on January 29, 2013 in Sarasota, Florida. (Photo by Tim Boyles)

A schoolgirl walks on an under-construction railway track at Navapura, on the outskirts of Ahmedabad, November 29, 2019. (Photo by Amit Dave/Reuters)

A girl walks an Akita-inu dog dressed in a military uniform in Vladivostok, Russia on April 9, 2019. (Photo by Yuri Smityuk/TASS)

A man wearing a headgear walks along with his child on a street in Banda Aceh on July 25, 2023. (Photo by Chaideer Mahyuddin/AFP Photo)

Palestinians walk at the site of Israeli strikes on houses, in Jabalia refugee camp in the northern Gaza Strip on November 21, 2023. (Photo by Abed Sabah/Reuters)

People walk with umbrella during snowfall in Istanbul, Turkiye on November 19, 2023. (Photo by Hakan Akgun/Anadolu via Getty Images)

A man walks pat sculptures with face masks on along an alley in Beijing on August 3, 2021. (Photo by Noel Celis/AFP Photo)

Evie and Conor Enright, from Portmarnock pictured on a walk in Howth, Co. Dublin on December 30, 2022. (Photo by Damien Eagers for The Irish Times)