Out of the seven Homolovi ruins, two were open to visitors. Homolovi II, the largest and most thoroughly excavated site, has a sidewalk and interpretive signs. It was occupied between 1330 and 1400, and has about 1200 rooms. Archaeologists believe that the inhabitants were trading cotton for pottery with the inhabitants of the Hopi Mesas. This ruin also features three large rectangular plazas and about forty kivas (underground ceremonial chambers). There are also several clusters of pit-houses, occupied before 1260, which appear as mere depressions in the earth. Petroglyphs may be seen along certain sections of a nearby trail (Tsu'vo).