I just got a pleasant surprise, with a new build I did in the work shop.

I was adding on the cliff base I created and built a room that you enter/exit via entering and exiting a cockpit. I built it above ground and when I placed it in a cliff/underground to test it I got a surprise.
I thought I would need to dig out the back room to be able to enter it, but instead a teleported into that space under the surface!

I would love to hear/see what others experience with it.