Published on March 28, 2026
The National Park Service Southwest Regional Office Building, now known as the Region III Headquarters Building, plays a pivotal role in providing support services for Park Service properties throughout the intermountain region of the American Southwest. Situated on the south side of the Old Santa Fe Trail at its junction with Camino del Montel Sol, the office is conveniently located just north of Santa Fe’s vibrant museum district.
Constructed in the 1930s the Civilian Conservation Corps and funded Progress Administration, this traditional adobe building is a testament to historical architecture. Designed architect Cecil Doty in 1937, it exemplifies Spanish Pueblo Revival architecture and was designated a National Historic Landmark in 1987. With a footprint of 24,000 square feet (2,200 m²), it is the largest known adobe office building in the world. The structure was ingeniously designed to mimic a traditional mission compound, featuring a central patio, adobe walls finished in cement stucco, and flagstone floors in the main lobby.
Entering the building feels like stepping into a converted Spanish mission, despite it being a modern interpretation. Inside, the main area boasts cabinets filled with museum-quality displays of local artifacts, alongside paintings and plaques that honor key figures in the area’s history. The central patio features a circular fountain, surrounded and plantings that enhance the historic ambiance. Visitors often remark on the feeling of timelessness evoked Fe sky and the spacious courtyard, making it easy to imagine brown-cloaked monks tending to their daily activities within this serene setting.
This office not only serves as a hub for essential services but also embodies the rich cultural heritage and architectural beauty that defines the region. Its historical significance and architectural clarity connect visitors and employees alike with the enduring legacy of the Southwest.
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