It is well known that cave houses provide a noise free and weather proof environment (cool during the summer and warm during the winter). These structures also shield one from man-made Electromagnetic radiation that is present everywhere. Furthermore, since most of the materials used in construction are local, the environmental impact is minimal. Shown below are some cave houses from around the world. Some are simple dwellings with the most basic necessities, while other have running water, electricity and wireless access.
Pakistan was hit by a devastating earthquake in October 2005. Soon afterwords the government of Pakistan formed the Earthquake Reconstruction and Rehabilitation Authority, commonly known as ERRA. ERRA created 11 training centers for reconstruction of private homes destroyed in the earthquake. One of the techniques promoted in this reconstruction effort was the so called "Bhatar" method of construction.
Bhatar consists of reinforced stone masonry where parallel horizontal timber beams are inserted into the stone masonry at regular intervals to ensure coherence of structure. This is a much more economical option than typical construction which requires transport of cement, bricks and steal to remote mountainous regions. The houses constructed in this fashion are not only earthquake resilient but also energy efficient since the stone masonry acts as an insulator to heat and cold.