Willis Tower (formerly named and still commonly referred to as Sears Tower) is the where the kids went to in A Trip Gone Wrong. One of the most popular tourist destinations in Chicago, and over one million people visit it's observation deck each year. It is a 108-story, 1,451-foot (442 m) skyscraper in Chicago, Illinois. It is also the tallest building in the United States and the seventh-tallest freestanding structure in the world. Izzy dropped in to the big lake by it, which is really cold.