Erendira Wallenda set a world record for hanging by her teeth over Niagara Falls. http://wtop.com/entertainment/2017/06/erendira-wallenda-plans-helicopter-stunt-over-niagara-falls/
The New York City Department of Cultural Affairs purchased a big top for Big Apple Circus in 2011. Now that the show is no longer under its previous ownership, the city is offering the tent for sale. https://www.dnainfo.com/new-york/20170619/upper-west-side/big-apple-circus-tent-department-of-cultural-affairs