Grandma couldn't bear to see the natural beauty obstructed, so she started digging a hole and a decade later this unique house encapsuls Grandma's special knak for eco & style. Futuristic living underground, geothermal activites provide a natural source of heat. Skylights hidden in the garden provide ample light into the sunken rooms of the house. The underground olympic pool is Grandma's secret. The gardens come to live at night. #sayu2810 #ecolifestyle #goldenage #grandma #SparkdGoldenAge #SparkdChallenges