Stamps Underground

STAMPS

in caves

No troglodytes here! The Stamp Fulfillment Service facility, located in Kansas City, MO, is located in a limestone cave 150 feet beneath the ground. It is the Postal Service’s only facility located underground.

* | Tags: Fun facts Map facts Stamps USPS Fact #768 | April 15, 2021

The consistent, year-round temperatures and humidity levels in the caves allow the stamps to be maintained in mint-quality condition. The underground facility also keeps the inventory and employees safe from snow, flooding, winds and tornadic activity common in the Midwest.