Iβm thinking anchor for space elevator
58 points
Nipples, where smaller planets could nurse.
9 points
6 points
43 points
Probably a tomb
26 points
Obviously energy collectors for the massive space ships.
14 points
3 points
23 points
Markers for the tombs of the ancient kings on a 1:1 scale map of the world.
13 points
Obstacles to prevent invasion by freakishly huge tanks.
4 points
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