Gyeongpo Aquarium is a small aquarium near Gangneung's Gyeongpo lake and beach area. It has tanks, experience zones, and a cafe, making it an easy family stop when the weather is poor or when you want a slower break between the beach, Gyeongpodae, and Ojukheon.
The aquarium is modest in scale, so plan it as part of a Gyeongpo-area circuit rather than as a full-day attraction.