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The 1WTC after humans disappear

The One World Trade Center, also known as the Freedom Tower, 1WTC, or One WTC, is the tallest building in the western hemisphere and the United States. Located in New York City, it is a replacement to the former World Trade Center that was was destroyed in the September 11 attacks. How long will it last?

1 day: Lights go out on the tower forever.

6 months: After half a year without maintenance, the once-elegant tower isn't looking so pretty. The windows have become green and grimy, and the steel has corroded.

3 years: Glass has broken and the building begins to waste away. After a flood, the first four floors of the tower have been flooded, and the foundations are disintegrating.

70 years: The spire buckles and falls to the ground.

110 years: After a hurricane even worse than Sandy hits NYC, the bottom floors disintegrate. The tower leans on nearby buildings, and can no longer stand on its own.

250 years: The entire structure is destroyed by harsh weather and corrosion.