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Hovenweep (Ute for deserted valley) consists of widely scattered Anasazi structures in Colorado and Utah, including square, round, and oval masonry towers and one D-shaped one built near springs. These smooth masonry structures are reminiscent of medieval European fortifications, but openings in the Hovenweep towers may have been for astronomical observation rather than for defensive purposes. Designated a national monument in 1923, Hovenweep has a visitors' center (in Utah, 16 miles east of Hatch) and five major sites.