Crossword clues for the word: ARECIBO The word ARECIBO has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for ARECIBO Showing 1 to 5 of 5 results Clue(s) "___ Observatory, home of the world's largest single-aperture radio telescope" Puerto Rican home to the Western Hemisphere's largest radio telescope Puerto Rico's ___ Telescope, formerly the world's largest single-aperture telescope Puerto Rico's -- Observatory SETI site