According to the museum's website:
El Camino Real International Heritage Center (ECRIHC) is one of New Mexico's newest State monuments, dedicated in November 2005. The Center contains award winning exhibits, interpretive learning center, and artifacts presenting the history and heritage of El Camino Real de Tierra Adentro - the Royal Road to the Interior.
Spain and Mexico used the royal road to colonize and bring goods to New Mexico from 1598 until the late 1800s. You can find a short history of the trail here. Longer articles about the El Camino Real can be found on this page, including an article that mentions my great uncle Albert Zimmerly.
Although I haven't visited the museum yet, you can bet that I will in the near future. If you are in or around Socorro any time soon, use these directions to find the musuem.