SubTropolis, a 14-million-square-foot underground business park in Kansas City, serves as a unique storage solution for both Ford and the U.S. Postal Service (USPS). Originally a limestone mine, SubTropolis was transformed into a storage facility in 1964 by Lamar Hunt. Ford first leased space there in 1965, initially using 82,000 square feet for parts storage related to its Kansas City Assembly Plant. Over the years, Ford has expanded its presence to over 1 million square feet, attracting aftermarket upfitters seeking proximity to its vehicles. The USPS also benefits from this facility, storing around $3 billion worth of stamps. The underground environment offers significant advantages, including rental costs that are approximately half of those for similar surface facilities and energy savings of up to 70% due to its naturally climate-controlled conditions. The unique subterranean setting has garnered attention, with car enthusiasts highlighting the storage of classic vehicles like the '73 Ford Mavericks.