100 Days Building A Modern Underground Hut With A Grass Roof And A Swimming Pool

How long and where did I build?
I been working very hard with my 2 friends about 100 Days to completely build, This underground hut is in a very small private jungle in California (United State), We did together with three people (2 people we are builders and one person he is camera man)

How large is it?
Underground Hut Dimension: Depth 5m , width 18m, height 7m, I knew the most of viewer they hard to believe but it real 100% by hand made with tools in video ! If you have any ideas, please leave a comment below my video.