La Paz County Arizona (Vacant / Not In Use) has 4 places on the National Register of Historic Places including 2 places of National significance and 1 place of Statewide significance. Significant places include Harquahala Mountain Smithsonian Solar Observatory Historic District, Harquahala Peak Observatory and Old La Paz, Old Presbyterian Church.
Some of the country's most noteable architects helped create the La Paz County places including Thomas Banks, Lucas, Frank and et al.. Prominent architectural styles found in La Paz Country are .