Americold holds 43,000,000 square feet (4,000,000 m2) of the quarry, much of which is occupied by warehouses or factories, primarily for food storage.
The total area of the underground is difficult to trace, but is rumored to stretch as far as Joplin, Missouri (roughly 20 miles (30 km) from Carthage).
It is frequently visited by urban explorers due to the decrepit abandoned quarries mixed seamlessly with working underground factories and warehouses.
It is also oddly present with an ecosystem of its own, with underground lakes hosting turtles, fish and various other species.
Unauthorized trespassing in their share of the underground can result in criminal prosecution, and the mostly uncharted abandoned areas are dangerous at best.