Megaconstruction

Oop! allows users to clone structures, and add these clones onto each other, permitting easy megaconstructions that use little memory.

Source: wiktionary

Across the nation megaconstructions spanned multiblocks.

Source: wiktionary

Also on the drawing board were a variety of megaconstructions that Erdoğan believed would place the city once more at the crossroads of the world.

Source: wiktionary

Or you might be floating above proposed megaconstructions in a city center.

Source: wiktionary