here your solution
https://www.google.com.au/search?q=Underground+Tubes+for+Passive+Cooling&newwindow=1&rlz=1C1CHBD_en-GBAU751AU751&source=lnms&tbm=isch&sa=X&ved=0ahUKEwidoJi2j43cAhUBHJQKHXPvBg4Q_AUICigB&biw=1680&bih=917

I use this solution on a smaller scale, sorry no photos
https://desertcommunity.wordpress.com/2013/03/03/underground-tubes-for-passive-cooling/