My island is broken.

[Rowde]

I had a similar experience and it turned out I forgot to make the 2nd set of mammet tools
those tools clear south of camp and let you build the 2nd landmark

[Darthgummibear]

I had a similar experience and it turned out I forgot to make the 2nd set of mammet tools
those tools clear south of camp and let you build the 2nd landmark

You misunderstand. I have all the tools, I have the available plots. It's just that I only have one option for what to build, not where. I have a second windmill under contruction, because when I got to the plot for the second landmark that was the only option available to me. Same thing with the workshop, but I couldn't build another one of those since I already had 3.

Edit: After an entire day of trying off an on to get back to the island, rezoning seems to have fixed whatever was causing the hangup. All the build lists are properly populated now. Would have known that a lot sooner if the server used for those instances wasn't on fire.