San Miguel County New Mexico has 50 places on the National Register of Historic Places including 3 places of National significance and 47 places of Statewide significance. Significant places include Bridge Street Historic District, Glorieta Baldy Lookout Tower, Glorieta Pass Battlefield, AT & SF Roundhouse and Acequia Madre.
Some of the country's most noteable architects helped create the San Miguel County places including O.M. Sperry, US Army Corps of Engineers, Meem & Mccormick and N. M. Sundt. Prominent architectural styles found in San Miguel Country are Bungalow/Craftsman, Queen Anne and Colonial Revival.