For some reason, world builders don't like building large flat worlds which accomodate large lots. So the comment about checking the index was totally unhelpful; they are just sending you on a wild goose chase.

In fact, this is my primary motivation for doing world building. No noe seemed to be building this type of world, so I was going to build one for myself. I turned out to be a much larger project than I thought it would be.

But, to be honest, I gave up looking for one a long time ago.

Be careful what you ask for.

Large, primarily flat, lots of large lots: Azureland

She has three others, two of which (Hatalma and SunshineX) are also large, flat with a lot of large lots. (The third might be as well, but I haven't tried that one).

evansdale county really impressed me. i think i'll use that world if i end up moving my current family.

There's a world on the exchange called Sunset Valley 2.... it is Sunset Valley flattened out, with everything removed. Combine it with the mod from here that allows you to add any lot size and create your own world. That's what I'm doing, slowly but surely.

Okay, so I've been doing my legacy in Sunset Valley, and I tend to make over the pre-made Sims and even the community lots. (Why they couldn't just have a bathroom on the beach lot automatically, I have no idea.) I've gotten praise on my makeovers, and I'm actually considering making over all of Sunset Valley - the Sims and their lots - to fit the new patches (like the breast and muscle def sliders, different skin tones, etc.) and to just generally make them more interesting and playable. If I were to do this, using all base game stuff without CC or EA store content, and make this Sunset Valley 2.0 available for download, who'd be interested in maybe downloading it?