Where is Tonghae?

Donghae-si2.3 km · 1.5 mi → Samcheok-si11.7 km · 7.2 mi → Santyoku12.8 km · 8.0 mi → Gangneung-si30.7 km · 19.1 mi → Gangneung31.1 km · 19.3 mi → Jeongseon-gun37.5 km · 23.3 mi → T’aebaek42.2 km · 26.2 mi → Taebaek-si43.5 km · 27.0 mi → Pyeongchang-gun65.8 km · 40.9 mi → Pyeongchang65.9 km · 41.0 mi → Neietsu69.2 km · 43.0 mi → Yangyang-gun72.0 km · 44.8 mi →

Cheorwon-gun38.24391, 127.44522 → Chuncheon37.87472, 127.73417 → Chuncheon-si37.88048, 127.72776 → Donghae-si37.52345, 129.11357 → Gangneung37.75266, 128.87239 → Gangneung-si37.75190, 128.87825 →