There are many things I want to do in this world still, but being survival, it's taking a while! Still, here is the world save if anyone wants to go exploring.
The first image is what I call "center city" in my head. You can see all the purpose-built buildings as well as the first of several volcanoes, and the world tree. The second image is the lonely mountain with the world tree next to it for scale. The mountain has been a work-in-progress for months, and currently is sitting at about 175,000 stone blocks placed for it.
The third picture shows the woodland border wall (unfortunately with a chunk missing, ty 1.14 chunk issues), with the hand-dug harbor that was born from a forest/plains biome.
The last picture shows the firelands, which is the newest of my projects. Once the mountain is complete, the firelands will be completed. (eventually)
Other than what is in the screenshots, there are dozens of smaller-scale builds scattered throughout the overworld, underground, and the workings of a proper nether hub coming in. There is also a rapture-esque city in progress, so if you look around the world, see if you can find it (it is mapped on a map wall somewhere in center city)

I won't include the world seed as this world was initially generated over 6 years ago, so none of the terrain will be the same for newer generations.