Visit the oldest operating church in the United States.
In downtown Santa Fe you'll find San Miguel Chapel. The church dates back to 1610 and was built by the Tlaxcalan Indians of Mexico who came to New Mexico as servants to the Spanish. The church's plain adobe design and earthen hues exemplify 17th-century Catholic churches, and the centuries-old religious art on display is definitely worth perusing.
While you're here, cross the street and pay a visit to the oldest house in the United States. Likewise an adobe structure, this house dates back to before Spanish colonialism, and was first seen by Coronado's men in 1541.