DOWNTOWN. Here you'll find research facilities for two divisions of the National Optical Astronomy Observatories. Located on an 80-acre mountaintop leased from the Tohono O'odam tribe for 200 years, the facility is 80 miles west of Tucson, but for those interested in astronomy, the top-of-the-line telescopes and exhibits are a must. Knowledgeable staff members can help you get a closer look at the mysteries of the universe. Reservations are required to participate in the nighttime observatory tour.

<i><b>Visitor center hours</b></i>&nbsp;&nbsp;Daily 9am-3:45pm <i><b>Tours</b></i>&nbsp;&nbsp;Daily 10am, 11:30am, 1:30pm

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