In 1977, an Illinois man built an underground house with rocks he collected on trips to Colorado to fight rising energy costs; nearly 50 years later, the 2,300-sq-ft ‘caveman’ home is listed for just $59,000
Pic credit: Midwest Real Estate Data LLC In the 1970s, when energy costs were climbing, an Illinois man went underground. The earth-sheltered house he built at 508 S Jefferson Street in Armington, Illinois, hit the market on Thursday for just $59,000. The home has already secured a place on this week’s most popular homes list,











