Land is always a good investment. Can you find minerals, build a area, even hit the next great oil well? All this is done by buying and producing on land. Look at the value of land, cost of construction compared to building sale value, and producion costs for minerals, mineral rights, oil production costs, gas costs. All this information, makes your land even better, since you know what you can do with it. Just be sure to follow the value of land in your area, and local investors and builders that you can work with.