4. 3 WTC Has a Custom Made Window Washing Device

Up on the roof of 3 WTC, a large robotic looking device is there just for window washing and maintenance on the 80- story building. The device is several stories tall and is custom made by Gind, a Spanish company focused on building maintenance systems. Imagine yourself being hoisted over the top in the carriage!

The machine sits on a track that encircles the roof, which allows it to be deployed on any facade. On our visit, a smaller window machine was located on the lower terrace, which will be partially open to the public.