I love the 'secret' stuff in here... very very cool

The 'secret turf door' ...which doesn't show up in too many of my bases... but is still implemented in a good handful...iis designed for placing O2 generators, or other portable equipment. Internal to the base for 'protection' against enemies. Early on it was a great way to place portable constructors to help make fuel without eating up the power grid, as well as O2 generators for valuable oxygen and water

the space with the door by the grow plots, what is that for?