thumb|The interior of SubTropolis SubTropolis is a business complex located inside of a limestone mine in the bluffs north of the Missouri River in Kansas City, Missouri. It was developed by late Kansas City Chiefs owner Lamar Hunt via Hunt Midwest Real Estate Development, Inc., with the trademarked phrase ''World's Largest Underground Business Complex''.
thumb|The interior of SubTropolis SubTropolis is a business complex located inside of a limestone mine in the bluffs north of the Missouri River in Kansas City, Missouri. It was developed by late Kansas City Chiefs owner Lamar Hunt via Hunt Midwest Real Estate Development, Inc., with the trademarked phrase ''World's Largest Underground Business Complex''.
SubTropolis is up to beneath the surface, dug into the Bethany Falls limestone mine. It has a grid of , tunnels separated by limestone pillars created by the room and pillar method of hard rock mining. The complex contains almost of illuminated, paved roads and several miles of railroad track.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).