When the fort closes at night, the doors lock and you stay inside. That’s when you might hear the ghosts of Spanish officers and priests who once lived in these centuries-old rooms. Ensconced inside the thick stone walls of one of the few extant Spanish missions in the United States, Espiritu Santo (circa 1749), your commodious apartment awaits with a kitchen, two bedrooms, and a fireplace. Pull chairs into the courtyard at dusk to watch the sunset. Later, it will be just you and perhaps some spectral visitors from the past.