People enjoy Giant Ferris Wheel in Vienna's Prater amusement park

Photo taken on March 24, 2019 shows the Giant Ferris Wheel in the Prater amusement park in Vienna, Austria. Prater amusement park's most famous piece is the century-old Giant Ferris Wheel, or Riesenrad, which was constructed in 1897 and is still operating today. (Xinhua/Guo Chen)