User blog comment:Matt Hadick/GDC 2015 - Killing the Loot Cave/@comment-216.171.98.1-20150317141601/@comment-1158256-20150317162845

Skywatch courtyard, near the fallen Hive seeder.

It was big in the early days of the game. The videos are still online, no doubt, so you can see what the hubbub was about. I personally used it a few times, but found it too boring to keep up for any length of time.