There's a terrain requirement on it that isn't spelled out in the description. You need some kind of V-shaped coastal formation, right?
Why is that difficult?
I've had this wonder be unavailable in cities where a coastal industrial zone existed. The only times I've ever been able to build was when there was when there was a bay formation.Not quite. You'll need to build it adjecent to an industrial zone
The Industrial Zone + Coast adjacency is pretty hard to appear, even in my hands
I'm going out on a limb here and assume you play Pangaea. It is rare to have a coastal Industrial zone on Pangaea but it's not unfamiliar for Continents and pretty common on Archipelago.