Willis Tower is a skyscraper with a height of 442 meters located in Illinois, Chicago. Willis Tower was completed in 1973 and is the tallest building in the world, exceeding even the high towers of the World Trade Center in New York and holds the record for nearly 25 years. Willis Tower is the tallest building in the United States and the seventh highest in the world and one of the most popular tourist destinations in Chicago. More than one million people have visited the observation room each year.
One of the favorite places for visitors to Willis Tower is an observation chamber box located on the 103rd floor, “The Ledge”. The uniqueness of this room is, all over the walls, the floor and the ceiling are made of transparent glass so that visitors can feel the sensation of being at an altitude of 412 meters above the Earth’s surface. The idea of a transparent space first emerged from the visitors who always attach the head of the window glass observation room and leave scars attached. Now visitors will not only be able to stick his head in the window, they can also stick her head on the floor as well.
This room can accommodate loads weighing 5 tons, and was first opened to the public on July 2, 2009. The transparent glass room is one of the major changes in the Willis Tower, which underwent a renovation in 2009.