Treehouse.

Shi Lang turned off the engine after the chopper touched down on the ground. The rest of the people suddenly got off the chopper and began to look around. Rosa asked, "Major Lang, have you been here a lot during your time on this planet?" 

"This is my first time." his reply shocked everyone but Quinn. 

Darcx asked, "Then the nose dive just now, how were you so sure about it?" his voice was shivering. That nosedive was a death stunt. 

Quinn replied, "Simulation practice." as she unloaded a few things from the chopper and said, "Come on, follow me. I have been here thrice in the past." 

The people understood what was going on and they walked behind Quinn. Shi Lang told Zysha to roam freely around the place. This hole was underground but it did have a lot of space and was enriched with an ecosystem of its own. After walking for over ten minutes, they found seven big wooden balls hanging between the trees.