Multiple choice general knowledge math & puzzles Where is the Sea of Tranquility? Near the Bermuda Triangle On the Moon In the Pacific Ocean In the Atlantic Ocean Reveal answer Fill a bubble to check yourself B Correct answer Explanation The Sea of Tranquility (Mare Tranquillitatis) is a large, dark, basaltic plain on the Moon. It is famous as the landing site for the Apollo 11 lunar module, where humans first walked on the lunar surface.