The Sunsphere is an iconic observation tower standing approximately 81 meters (266 feet) tall, and it is one of the primary landmarks of Knoxville, Tennessee, USA. Preserved from the 1982 World's Fair, this tower has become a true symbol of the city and a popular spot for tourists.

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The Sunsphere's main feature is its unique design: a massive golden sphere sits at the top of the tower. This sphere, 23 meters in diameter, is covered with glass panels with a 24-karat gold dusting, allowing it to reflect sunlight brilliantly and giving the structure a futuristic appearance. It was originally intended to symbolize the sun, the source of energy, fitting the fair's theme "Energy Turns the World."
The Sunsphere is located in World's Fair Park, which was created specifically for the fair and is now a popular recreation area. Inside the sphere is an observation deck offering panoramic views of Knoxville, the Tennessee River, and the surrounding Appalachian Mountains. In addition to the viewing area, the tower also houses a restaurant and hosts various events. Thanks to its unusual shape and golden glow, the Sunsphere is easily recognizable and an integral part of the city's skyline.