The historical border of the Silla and Baekje Kingdoms, Rajetongmun Gate of Seolcheon-myeon, Muju was formed from a rock cave in Seokgyeonsan Mountain. The tunnel is approximately 3 meters in x_height and 10 meters in length, and divides the villages of Sindu Maeul into Dugil-ri, Seolcheon-myeon and Inam Maeul in Socheon-ri. During the Three Kingdoms Period, the rocky ridges of Seokgyeonsan Mountain drew the boundary of Silla's Mupung in the east with Baekje's Seolcheo to the west.
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