
Engineer Fortifies Mountain With 30 cm Concrete to Build Zero-Cost Underground Home
The Ozark Mountains in the state of Missouri, USA, are home to an engineering feat that breaks the mold. Conway, a former soldier and mining engineer, purchased a 225-acre plot of land in 1970 and proceeded to carve into the slopes as if they were a mine, constructing a reinforced concrete house underground. Built entirely by his own means without the help of an architect or outside assistance, this colossal structure still stands firm and draws attention, even after half a century.



















