The Inca site at Raqch'i was a primary checkpoint on a road system that originated in Cusco and expanded as the Inca Empire grew. It is located in a valley known for its sacred sites. Most Inca buildings are surrounded by a 4 km (2.5 mi) perimeter wall, but just outside of this, on the Inca road leading from Cusco to Raqch'i, there was probably a tampu (a hostel for travelers) with eight rectangular buildings around a large courtyard. Administrative records dating to about the same time as the site indicate that this was in all probability such a site. The Raqch'i complex consists of several different areas, each with a specific function. Some have noted that these buildings may have served religious and administrative officials. Others speculate that these buildings, coupled with the size of the defensive structures, may have been used as barracks to house troops. Nearby are about 220 round buildings, probably used as warehouses, called qullqas. On the nearby slopes are irrigated terraces, which probably served to keep the qullqas full for those passing through. Raqch'i is also home to a nearby spring and a pool or bath near the Temple of Wiracocha, which could have been used for rituals. It has also been mentioned that due to the dual religious and administrative purposes, the Sun Cult may have owned the surrounding lands to keep lamas as offerings, like a similar site called Mayobamba. Source: en.wikipedia.org/wiki/Raqch%27i