A hot air balloon is pictured in Warstein, Germany, Sept. 5, 2023. An activity was held on Tuesday in Warstein for tourists to enjoy the view on hot air balloons. (Photo by Ulrich Hufnagel/Xinhua)
Hot air balloons are pictured in Warstein, Germany, Sept. 5, 2023. An activity was held on Tuesday in Warstein for tourists to enjoy the view on hot air balloons. (Photo by Ulrich Hufnagel/Xinhua)
People inflate a hot air balloon in Warstein, Germany, Sept. 5, 2023. An activity was held on Tuesday in Warstein for tourists to enjoy the view on hot air balloons. (Photo by Ulrich Hufnagel/Xinhua)