Reminds of old summer vacations.
I would go with my best friends family to visit relatives in NC. One of the relatives was the manager for grocery store distribution warehouse. We would go to work with him and just get lost for fun. It warehouse was so large, you took a golf cart to get anywhere and everyone was given a walkie-talkie. We drove all day and had a blast.
Every afternoon, they loaded up trains for the shipments. The train track actually went through the warehouse. That's when we figured out we had only seen about half of the building.