Rios-Caledonia Adobe, Adobe house museum in San Miguel, California.

The Rios-Caledonia Adobe is a two-story adobe house in San Miguel with hand-made roof tiles secured to pine beams using rawhide strips. The construction preserves building materials and techniques from 1835 and shows how structures were made in this region during that time.

Petronilo Rios, the military leader of the Mission San Miguel guard, directed the construction of this adobe house around 1835 using indigenous workers on mission land. Later, the building served as a travelers' inn between 1868 and 1886 before the railroad changed the region.

The building shows early California residential design that combines Spanish colonial architecture with local building methods and materials. This blend shapes the structure's appearance today and tells of a time when local resources determined how people built.

The adobe stands on South Mission Street in San Miguel, across from Mission San Miguel. The site is operated as a county park, and a building added in 1930 holds a local history research library. The museum and gift shop opened in June 1978, when tours of the adobe also began.

From 1868 to 1886 George Butchart ran the building as the Caledonia Inn, a stagecoach stop, hotel and tavern on El Camino Real. The coming of the Southern Pacific Railroad to San Miguel ended the inn's trade. In 1887 the adobe briefly served as an elementary school.