@derokflow: I built a hidden underground room in my backyard… 😳 It started as a simple underground structure and slowly turned into a fully finished living space. The shelter was sealed, insulated and finished from the inside before adding wood flooring, lights, furniture, a bunk bed, sofa, fridge, TV and even air conditioning. Then solar panels were added outside while the entrance stayed hidden at ground level. 👀 The final result looks completely different from the beginning. Would you spend a week down here?