SubTropolis the world's largest underground business complex

I was following a train when I saw this from the road and decided to see what it was. This is SubTropolis a 55,000,000-square-foot, 1,100-acre artificial cave in the bluffs above the Missouri River in Kansas City, Missouri, United States, that is claimed to be the world's largest underground storage facility. Developed by late Kansas City Chiefs owner Lamar Hunt. The complex contains almost 7 miles of illuminated, paved roads and several miles of railroad track. The mine naturally maintains temperatures between 65 and 70 °F (18 and 21 °C) year-round. A must see if you're in the area.

================= EQUIPMENT ================

=================Cameras & Sound ============
Settings: 4K 30FPS
Drone: DJI Mavic pro alpine white
Camera: IPhone 12 pro
Music:
Microphone System: dji wireless mic

================= Editing ====================
LumaFusion