In 1985, Levon Arakelyan’s wife asked him to dig a potato cellar in their basement in Arinj, Armenia. He did this, and then continued digging for 23 years. At his death in 2008 he’d produced a network of rooms, steps, and corridors that extended 21 meters beneath the couple’s two-story house. A builder by trade, he did all of this with hand tools. Today his widow runs a small museum and gives tours of her late husband’s strange obsession. More photos here.