Nagasaki Chinatown is noteworthy for its shopping, and you can make a stop at top attractions like Nagasaki Dejima and Hamanomachi Arcade.
While there might not be top attractions in Obama Onsen, you can explore the larger area and discover places like Unzen Jigoku Hell and Unzen Ropeway.
While visiting Dejimamachi, you might make a stop by sights like Nagasaki Dejima and Nagasaki Prefectural Art Museum.