Here you will find three mansions near the spawn. They are located at coordinates -360 ~ 296, 312 ~ 88, and 40 ~ -392. There are also two villages not far from the spawn. Both settlements are quite large. You will find them at 100 ~ 228 and 244 ~ -172.
How to use Three Mansions Near the Spawn seed
Start the Singleplayer mode
Select ‘Create New World’
Then click on ‘More World Options…’
In the ‘Seed for the World generation’ field, enter 7818671165583200816