Has anyone made one of these underground greenhouses?

[mlb]

Does anyone on here have experience with underground greenhouses? Do any of you have one like this? i would love ideas and photos of what you have done we have hard winters here in eastern washington so i am only interested in it if it is at least a few feet in the ground. thank you!
this is the link for a video on what im talking about

 

[Tetters]

Welcome to the forum @mlb

How I wish !! - I would love to build a greenhouse like this ! You will find quite a lot of information online these days, and a few good videos on Youtube.
If you do decide to go ahead with your own build, it would be great to be able to follow your progress on this forum, and you will probably start a new craze.