I just saw this
video and had to share it with this community. During the heat wave of 1906, Baldasare Forestiere dug a home
underground with just a pickax and shovel. He spent 40 years excavating 10 acres of rooms, tunnels, a chapel, an underground aquarium and courtyards to experiment with underground farming. He had fruit
trees planted 12-22 ft underground with light
wells.