It is supposed to resemble this:
Currently building it on my un-owned no-mans land at the outskirts of Big City
I changed lava and water to lapis and glowstone for obvious reasons
EDIT: Thanks Goofmobber, convinced me to make the lava lava (but water is still lapis :’()
Basically, when BigCity expands to where any current builds are, they will get moved or demolished. To make sure your builds don’t get destroyed, don’t build in the flattened area around BigCity.