The N Seoul Tower is a 777 foot tall communication and observation tower located on Namsan Mountain in Seoul, South Korea. The most distinctive feature of the tower is the large green letter N that is placed on the outside of the tower.
125 years after people: The Namsan Cable Car collapses severing the tower's connection with Seoul.
150 years after people: Due to corrosion, the tower loses its large green letter N.
175 years after people: The antenna falls from the tower.
250 years after people: A strong windstorm causes the N Seoul Tower to break and come crashing down the mountain.