This is the Cross Family. Several generations ago when the Sims first landed on Lunar Lakes, the Cross Family was the one who discovered Crystal Tech. With ingenuity they turned Lunar Lakes into a sparse desert into the thriving community it is today. The Crosses are the leaders of the community and one of the most wealthy families in the new world.
This is one of the best shots of the world there is. It show your just how awesome and vast the town is. The special blue of the lakes, the geometric shapes in the roads and rivers, the spaceship and domes in the distance, the unique trees and homes... man I can't wait until tomorrow!
Milestone 5 is so close! And now that i'm here at my computer I'll get the screenshots to you as soon as we hit it! I hear there's something cool coming when we reach THE FINAL MILESTONE! So stay tuned!
Source The Sims 3 Forum