I've come across some amazing construction, especially Baal Garnaal's City and the area south and SW of the Enterprise. I wish those responsible, and many other inventive people, would give us screenshots and videos.
Baal hasn't been on in a while. If you mean his city with the giant harbor, that one is pretty cool. He also did the roman town SW of the Enterprise a ways. He created that before property and it got griefed pretty badly before I protected it. I might have named it "Roman Town". Baal had nice style.
For reference, my own castle is SE of the Enterprise with the five towers on top of one castle. I don't remember what I called it... maybe Wizard's keep. It's at the southern tip of an island. But I actually have a lot of structures around. The giant angled bridge, the (non functioning) drawbridge at one end and the little town there are also mine. The ferris wheel is also mine... when physics works someday then I will make it spin. I have a couple little thatched cottages around and a few modest houses with giant hidden basements. If you find one with boats parked on top then that's probably mine.

Some of that is already featured on the web site.
I don't remember the exact coordinates anymore but there is also planned a new spawn point someday and I have a town of randomly generated buildings there. I only put the roads and street lights in by hand. To the east of that, I have a house in someone else's town that I tried to make into a tannery.
There are many cools things if you wander around.
If I remember the new spawn point location then I may post back.