In the urban area, several small mountains and hills play the same role. Dalseong Park, which sits inside a 1,500-year-old earth fortress, is a historic place of the city. It contains the city's only zoo and some monuments as well as the wall. Duryu Park or Duryusan is a large forest in the middle of the urban area. It has Daegu Tower, Woobang Land, Kolon Bandstand, Duryu Stadium, and many sports facilities. Daegu Tower, also called Woobang Tower or Duryu Tower, is the tallest contemporary structure (202 m) and a symbol of the city. Its observatory commands good views of the surroundings. Woobang Land is the largest amusement park out of the capital area. Many small gardens lie in the heart of the city, such as the National Debt Repayment Movement Memorial Park (Gukchae Bosang Park) and 2·28 Park. The former park includes Dalgubeol-daejong (), which means the Dalgubeol grand bell. The bell is struck every week and year. There is also a botanical garden with a variety of plants and flowers.