As one of the most famous bridges along the Cheonggyecheon along with Gwangtonggyo, Supyogyo was built in 1420 (the 2nd year of King Sejong). At that time, the bridge was called “Majeongyo,” as it was near a horse market (“majeon” in Korean). It was renamed “Supyogyo” when a water marker was erected beside the bridge in 1441 (the 23rd year of King Sejong) to measure the water level of Cheonggyecheon.
The cache is located near Supyogyo bridge.
Congrats to sug8a, wonkoo1 and K-one on their FTF's!