In 1978, Monolithic’s president David B. South and Judy, his wife, built Cliffdome. The home is perched on the cliff of the South Menan Butte in Menan, Idaho overlooking the Snake River. Cliffdome was the largest Monolithic Dome home ever built at that time. It is 75-feet in diameter, 28 feet tall, two and a half levels, 8000 square feet of living space and 1500 square feet of attic space.