A family travel course where you can directly see, learn, and enjoy the underground spaces of Taebaek. At Yongyeon Cave, you can walk through the cool cave and observe various rock formations and mysterious landscapes up close, and at Taebaek Coal Museum, you can vividly experience the lives of old miners and the appearance of a mining village. This is a good itinerary for families to explore with children, especially recommended for family travelers.