20 [Deleted User] In: Question-Answer Which of these famous sites doubled as an astronomical observatory? 20 Which of these famous sites doubled as an astronomical observatory? Angkor Wat Roman Forum Machu Picchu Pantheon 1 Answer Voted Oldest Recent Random Best Answer Goto 2021-07-26T22:33:18+00:00Added an answer on July 26, 2021 at 10:33 pm The correct answer is: Machu Picchu. 3 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.