Former five-weight world champion, Floyd Mayweather retired undefeated after 50 professional bouts last year and has developed interests in gambling, strip club ownership, and property. According to Business Insider, Mayweather has long had sky-high plans but his latest project is unlike any other as the 41-year-old has said he is involved with One Vanderbilt — a skyscraper currently under construction in New York City. Mayweather said: "The project I'm working on now is called One Vanderbilt.