[firebones]

There's a Ford manufacturing plant 3-5 miles from many of Kansas City's limestone caves along the Missouri river. And as the comment-linked video down below shows, these warehouses are vast and even used for commercial businesses. You can play paintball in a cave at Subtropolis.

Not too far away (3-4 hours), the salt mines in Hutchinson, KS store a lot of Hollywood memorabilia.

One big plot point of "The Day After" back in the 1980s was that people sought shelter in the underground caves around Kansas City.