Take a tour of the world's most famous boxing gym where Muhammad Ali, Mike Tyson, and countless celebrities have trained

• Gleason's Gym in Brooklyn, New York is arguably the world's most famous boxing gym, having trained everyone from Muhammad Ali to Floyd Mayweather Jr.
• Anyone can train at Gleason's Gym - most of the members today are regular New Yorkers learning how to box
• Gleason's is one of New York City's "last true melting pots," according to owner Bruce Silverglade

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To call Gleason's Gym in New York City a "mecca" of boxing is an understatement.

Nearly every major boxer over the last half-century either learned how to box at Gleason's or trained there in advance of one fight or another. Legendary fighters like Muhammad Ali, Roberto Duran, and Mike Tyson - along with current boxing star Floyd Mayweather Jr. - have all trained at Gleason's.

Since the gym opened in 1937, Gleason's has helped 134 world champions reach their peak. In 2016, the gym moved a few blocks from its long-time home at 77 Front Street in Brooklyn's DUMBO neighborhood to a new location.

We visited recently to see if it's still full of the sweat and grime that has long marked the gym as a true New York landmark.