Pemberton Festival obviously out to open the door to something evil

This thing is halfway between the Pemberton Stage, where bro-reggae outfit Rebellution is currently playing, and the Whistler Stage, where dubstep fiddler Lindsey Stirling is prancing around. 

You can hear both acts clearly from it, which likely means the festival organizers are attempting to open a portal to another dimension that Cthulu will emerge from. Steer clear of this evil structure, festival goers.