Dream Water Park Build

We are from India and we live in United States of America (USA). In this video we going to show you about building our dream water park with underground water slide house with very simple tools and skill !

How long and where did I build?
I been working very hard with my 2 friends for 278days to completely build, This underground is in a very small private jungle in California (United States), We did together with three people (2 people are the builders and one person is camera man)

How large is it?
Underground Dimension: Depth 5.2m , width 15.3m, height 8.3m, 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.