14 Anonymous In: Question-Answer Where is the world’s deepest underwater sinkhole? 14 Where is the world’s deepest underwater sinkhole? Mediterranean Sea South China Sea Caribbean Sea Adriatic Sea 1 Answer Voted Oldest Recent Random Best Answer Goto 2021-07-07T05:23:47+00:00Added an answer on July 7, 2021 at 5:23 am The correct answer is South China Sea. 4 Reply Share Share Share on Facebook Share on Twitter Share on WhatsApp Leave an answerLeave an answerCancel reply Featured image Select file Browse Click on image to update the captcha. Save my name, email, and website in this browser for the next time I comment.