- You can visit this great archeological find at 1100 W Ruins Dr. in Coolidge, Az. Also known as “the great house” stands a strong building. Archaeologists believe it is made out of mud or sand and clay. The ingredient of calcium carbonate turns into concrete. IYou can’t break it that easy! they call it Caliche. Believed to have existed 600 years ago and abandoned for 500. It was built to house priests and ancient Sonoran people. The house has eleven rooms and even has a ballcourt!