13. Village of Kandovan, Iran
14. Nas montanhas de Fafe, Portugal
15. Dietikon, Switzerland
16. Bolton Eco House, England
17. Malator in Druidstone, Wales
18. Cave House, Festus, Missouri
19. House of Spiritual Retreat, Seville, Spain
20. Cave Home, Troo, France
21. OUTrial House, Poland
22. House Cave, Sacromonte, Spain
23. Vardezia cave city, Georgia
24. The Brochs of Coigach, Scotland
