Completion of the Bus Stop bundle at the Community Center will allow you to ride the Bus near your home. The Bus will take you to a new area called The Desert, a place sometimes mentioned by villagers in Stardew Valley and located on the Northwest corner of the map.
The Desert has several locations to note, including the Skull Dungeon, which is only accessible to those who have obtained a Skull Key from finishing all 120 levels of the Mines. There's also a small lake in the area which serves as the only place where Sand Fish can be caught. Coconuts and Cactus Fruits are also exclusive to this area, making The Desert necessary for Community Center completion.
Related: The Many Hidden Secrets of Stardew Valley
In addition, there's a small pink building called Oasis where there are useful items to purchase and NPCs to talk to.