Geulhemmer quarry

You have an unused entrance to an unused quarry. You already have a ceiling and sidewalls. The only thing you need to do is build a backside and a front to have a home. These underground livings are not in use anymore since 1931. It's damp, dark and a constant temperature of 11 degrees. Although there has been an underground living near Maastricht where in 1971 the last person died in here home aged 91.  
However, a new underground living has being built app 500 metres away from these in Geulhem. Of course all very modern.