KUBill t1_j4slsho wrote on January 17, 2023 at 11:41 PM Reply to comment by [deleted] in TIL about SubTropolis, a giant former limestone mine under Kansas City that was converted into the world’s largest underground business complex. The 1,100-acre complex is accessed through tunnels, and as of 2015, 1,600 people worked there. by corn_dog_22 Shouldn’t see much radon in a limestone cave. Permalink Parent 10
KUBill t1_j4slsho wrote
Reply to comment by [deleted] in TIL about SubTropolis, a giant former limestone mine under Kansas City that was converted into the world’s largest underground business complex. The 1,100-acre complex is accessed through tunnels, and as of 2015, 1,600 people worked there. by corn_dog_22
Shouldn’t see much radon in a limestone cave.