Cmdr_Crimson
Well-Known Member
They way they are getting them to "Float" judging by the models seems to be through the vines connecting them to the ground.
Those vines seem big enough to hide supports inside for the large structure. But you seem to be right about the smaller mountains on top. It looks like it's behind the other mountains just enough so you can't see the beam holding them together.
It maybe similar to what they did with this floating rock structure at Legoland's World of Chima section..