Artificial Ice Islands
Islands fabricated from ice are becoming more prevalent as offshore oil speculation in the Arctic gains more interest. Ice has been a strategic building material in the Arctic for the construction of roads, airstrips, housing, and, in the last few decades, as temporary drilling platforms to explore for oil. Ice islands are formed by spraying ice into cold air (below 20 degrees F), and layering the ice until it reaches a thickened state.

via infranet lab