Fort Union National Monument
Exposed to the wind, within a sweeping valley of short-grass prairie, amid the swales of the Santa Fe Trail, lie the territorial-style adobe remnants of the largest 19th century military fort in the region. For forty years, 1851 to 1891, Fort Union functioned as an agent of political and cultural change, whether desired or not, in New Mexico and throughout the Southwest. Fort Union National Monument is designated as an International Dark Sky Dark Sky Park by the International Dark-Sky Association.
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