Why are choppers allowed to land on one of the great ruins of the world?
Was it an emergency?
Or some VIP on a site seeing tour?
That’s from a recent trip report by Bianca Bauza – Ciudad Perdida, Some of the Best Hiking in Colombia
Best hikes, treks, tramps in the world.
besthike.com 
There’s an Army base there – that’s generally how they arrive and leave I believe rather than trekking in and out.
Ah ha. Thanks Geoff.
That makes sense.