There is a mysterious place in korea. The name of it is Olumgol(Ice narrow valley). Olumgol is located 700m above sea level on the foot of Chaeyak. Mt.  It freezes in summer and melts in winter. The hotter it is, The more ice is frozen-How mysterious it is! Olumgol is appoin ted as natural asset No  224 and many people visit here  to avoid hot weather in summer.