Ключевые слова: 6, abstract, alien, america, angle, antenna, architecture, arecibo, astronomy, attraction, biggest, caribbean, china, discovery, dish, forest, green, hills, june, karst sinkhole, landscape, life, naic, nature, observatory, observatory de arecibo, park, puerto, puerto rico, radio, radio telescope, radiotelescope, reflector, rico, satellite, science, signal, space, spherical reflector, telescope, tourism, tourist, travel, universe, vacation, visit,