u/Embarrassed-Chart-63

This seems to be the longest single span bridge you can make with concrete/limestone. the center tower is about as tall as you can build on this bridge. It's completely impractical but it has a nice view. Center area is the main base with a small green house for food. the spans on the side are a double layer greenhouse filled with coffee plants to sell for Ren. located in J14 on Olympus in the dead end cannon.

*edit spelling