Well, lookey here!
SUBTROPOLIS - World’s Largest Underground Business Complex
It's in Kansas City, MO (little less than 2 hrs away from Atchison, KS underground facility. Hmmm… are there tunnels beyond the advertised 8 mi of paved roads & 2 mi of railroad tracks?? )
SubTropolis Facts & Figures:
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Over 6,000,000 square feet of leasable space
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More than 8,000,000 sq feet for expansion
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8.2 miles of lighted, wide, paved roads
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2.1 miles of railroad track
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More than 500 truck dock locations
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Served by over 300 truck lines
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17-foot ceiling height
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More than 55 international, national, regional and local companies
https:// huntmidwest.com/industrial-space-for-lease/what-is-subtropolis/