See **how to build** an awesome **underground house** for **survival skills** using **primitive** techniques! This **building ...

A homeowner is reeling from the discovery of a hidden room found 13 years after they first purchased the property. When Laura Kohler and her husband first moved into their home in Munich, Germany, she ...

See **how to build** an amazing **underground house** using **primitive** techniques! This **building** project is a fun ...