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The original was posted on /r/todayilearned by /u/tyrion2024 on 2024-07-04 18:57:24+00:00.

Original Title: TIL the deepest known blue hole (underwater sinkhole) in the world is called the Taam Ja’ Blue Hole and is in Mexico’s Chetumal Bay. It’s been measured to 1,378 feet (420 meters) deep, although scientists still haven’t found the bottom.