I have a friend in Indiana, and i helped him build his geodesic dome.
It was in the midle of a forest, and it suited his porpose. It even had a
area to put a chimney (it gets cold there). As far as i know, for the cost of building.
Time, materials, etc.
It was a great investment. It went up quick. It was pretty big, probably around 30m
in diameter. And the best part was he didn't have to pour a foundation.
Now on a macrocosmic level, you have the
millenium dome. This is amazing because it actually creates its own weather system.
edit: millenium dome is not a geodesic dome,