Try as so many private and government organizations might, switching everywhere on Earth over to clean, renewable energy — including some strange sources being explored — is still a long way away. Thus, oil remains one of the hottest commodities on the planet, for everything from keeping automobiles going to helping out virtually all major forms of manufacturing. Naturally, the extraction of it remains a major industry as well, and it hasn't stuck to the boundaries of dry land. Offshore oil rigs have made it possible to collect oil and natural gas from below the ocean's floor, appearing as massive megastructures in the middle of open water.

Given their sheer size and placement, one has to wonder how offshore oil rigs are constructed. Unsurprisingly, these monuments to the modern world's need for fossil fuels aren't constructed from the ocean floor up. Keeping things far more practical, they're assembled like any other structure: by large construction crews on land before being moved to the desired drilling location in the ocean. This is done with the aid of several heavy-duty transport vessels and massive cranes to move rigs without issue. These structures typically float and are anchored in place, having been meticulously designed so that they do not topple over at the first reasonably strong gust of wind.