Aerial view of sandbanks along Vistula river in Warsaw, Poland
2021-01-04 14:35:51 GMT2021-01-04 22:35:51(Beijing Time)Xinhua English
Aerial view of sandbanks is seen along the Vistula river at the nature reserve Wyspy Zawadowskie in Warsaw, Poland on Jan. 3, 2021. (Photo by Jaap Arriens/Xinhua)
