http://www.messynessychic.com/2013/09/05/the-1970s-cold-war-era-home-built-26-feet-underground
http://www.messynessychic.com/2015/01/23/take-a-tour-of-a-1964-underground-fallout-home/
http://www.messynessychic.com/2014/07/02/the-town-that-went-underground
http://www.messynessychic.com/2013/01/20/the-italian-hotel-built-inside-abandoned-medieval-grottos