The world is a flat stationary plane. the north star, Polaris, is directly above the North Pole and remains in the exactly in the same spot while the other stars rotate around this central point.
The curvature formula for a supposed ball the size of the earth is 8 inches per mile squared. After just five miles the curve should have already dropped 26 feet, yet there is absolutely no demonstration of this drop in the real world. In fact you can see much much further than this with certain optics and there is no evidence of such a curve.
Why don't engineers and architects ever worry about this exponential drop?
This world was set up as a massive energy grid, with advanced society and structures around the plane before an unknown extinction event essentially melted everything into the mountains, canyons, and ruins we see today. "Ancient" structures, spires, columns, and domes are all survivors of this culture. I believe this secret part of our past is one of the reasons they chose to lie about our Earth.