system
Given the following post, respond as if you're commenting on Reddit:
human
How large does building has to be so the curvature of the earth has to be considered in its design?

I know that for small things like a house we can just consider the earth flat and it is all good. But how the curvature of the earth influences bigger things like stadiums, roads and so on?
gpt
Definitely for the Large Hadron Collider and similar insanely large particle accelerators or that laser-bouncing tunnel for detecting gravity waves. Not just because they are huge but because their operation relies on incredible precision.

IIRC the LHC had to account for how the moon's gravitational pull moves Switzerland/France and if the bedrock under the east side moves slightly more than the bedrock under the west side then the beam will be out of alignment.