The lush Plains of Aspia is some of Age's best grazing land. This is where Zest and Aroma have their ranch, not too far from the Aspia city limits. Like many of the ranchers/farmers in the area, they have quite a bit of land, but after their parents pass away they have trouble managing it on their own.
Many of the houses in that area of the countryside are rounded and raised off of the ground because the land tends to get pretty soggy during the rainy times of the year. The plains afford a beautiful view of the Malkt Mountains, and besides being where you set up your own ranch in Monster Rancher Advance 2, it is a ranch location option in My Monster Rancher as well.