Otero County Colorado (Historic Districts) has 7 places on the National Register of Historic Places including 4 places of National significance. Significant places include Bent's Old Fort National Historic Site, Santa Fe Trail Mountain Route Trail Segments-Bloom Vicinity, Santa Fe Trail Mountain Route Trail Segments-Iron Springs Vicinity and Santa Fe Trail Mountain Route Trail Segments-Timpas Vicinity and La Junta City Park.
The famous person Basil M. Spalding is associated with one of more of the Otero County historic places.
Some of the country's most noteable architects helped create the Otero County places including Charles Bent, William Bent, John Gwyn, Works Progress Administration and Civil Works Administration. Prominent architectural styles found in Otero Country are Late 19th And Early 20th Century American Movements and Queen Anne.