Illinois man built underground ‘caveman’ home in 1977; now listed for $59,000

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, according to Realtor.com.The 2,300-square-foot home, which was built nearly 50 years ago, still has its rock interior intact, along with an unfinished kitchen and rooms.A house built into the landscapeThe house wasn’t built like the ones we often encounter. The stones here did not come from a quarry. According to the listing, the Davis family hand-collected river rock during annual trips to Colorado, then used it to cover the ceilings, walls, doorways and arched corridors.That’s right! Each stone was handpicked, and every one of them made the trip to Illinois.