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Seoul’s secret space: Vast mysterious tunnel revealed for the first time

By Raphael Rashid

13 Sep 2023 · 2 min read

informed Summary

  1. A mysterious underground tunnel, stretching 335 metres and covering 3,000 square metres, has been discovered beneath Seoul Plaza, one of South Korea's most well-known spaces. The tunnel's original purpose is unknown, with city officials speculating it might have been built to connect two subway stations but was never used.

If you look in the right place, beneath the bustling streets in the heart of Seoul, you will come across something unexpected: stalactites.

They hang ominously from the dank ceiling, a witness to the passage of time and decades of neglect.

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