Minecraft wiki entry for Nether_hub, associated text: If you have multiple locations in the overworld that you want to be easily accessible, then just travel to the location in the nether, build a portal, and travel through it. You should come out about where you wanted to go. If you have an exact spot you want the overworld portal to go that is close to where the portal generated, you can just remove the overworld portal and build a new one in your desired location. If you are running low on obsidian, you may want to consider taking the corners off of the generated portal. It may not look as nice, but it will give you four extra blocks of obsidian. To improve the look of the portal, place cheaper blocks such as wood blocks or chiseled stone bricks.