The October issue of Land Lines reveals the remarkable story of how an estimated one million people came to live in subterranean apartments in Beijing.
Oct 13, 2014 Land Lines
The city of Helsinki has developed a master plan for its burgeoning underground city.
Feb 24, 2011 The Huffington Post
A recently-discovered "underground city" beneath Leavenworth, Kansas, has locals mystified as to its origin and purpose.
Aug 11, 2008 KCTV Kansas City