Amazon, an online retailer, has designed rainforest-like offices in Seattle headquarters to create a new space for its employees. The so-called spheres consist of three interconnected glass domes. The building, which was designed by the NBBJ architecture office, was opened for use in 2018. The building resembles a greenhouse, unlike a typical office. Three glass spheres are built of 620 tons of steel. The structure consists of an open plan indoor area that hosts 400 plant species and around 40,000 plants. Instead of closed conference rooms or tables, employees go to extraordinary meeting rooms called ‘tree houses’ via their chairs and walkways. These interesting spheres are open to the public throughout the year.