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Midwest's largest underground storage facility getting bigger
SubTropolis the world's largest underground business complex
The Hidden Metropolis Beneath Kansas City
Springfield Underground Expanding Storage Space
Go Inside SubTropolis - NBC Sunday Today Show | October 16, 2016
Trucker Life - Springfield, Missouri Underground
Subtropolis — Travel Channel (2004)
Target hero? Guy drains parking lot at local target and goes viral.
Subtropolis
Average day in a heavily defended secret underground research facility.
World's Largest 55,000,000 square foot Underground Business Complex | Subtropolis
Subtropolis- The Massive US Strategic Underground Storage System
