[yra]

thanks, Egg. I know trees to be like matches, they crackk all around me under wintersnows in a light breeze.

Have been living at the foot of Ingleborough hill in Clapham, North Yorkshire, GB for some years, masses of caves under there, many fill up with water rapidly when it rains...

here in southern norway I am surrounded by granite (which on the surface splits each winter under the force of ice). My cellar walls are made from large granite blocks, unfortunately the roof planks above might be 200 years old...

I had to drill for water and the modern custom is to drill approximately 80 meters down into the rock - because they say the cavities there are always filled with water/waterpressure is high enough there - guaranteed 2000 liters per day...

If you got rocks around you - get psychic senses working for you to locate cavities in the rocks - might take searching/building time down drastically