People watch dogs playing on the snow-covered lawn in Frankfurt, Germany, Jan. 18, 2024. Snow fell in Frankfurt on Thursday.(Photo: Xinhua)

A man records flying pigeons in Frankfurt, Germany, Jan. 18, 2024. Snow fell in Frankfurt on Thursday.(Photo: Xinhua)

People and a tram are seen after snow in Frankfurt, Germany, Jan. 18, 2024. Snow fell in Frankfurt on Thursday.(Photo: Xinhua)

People are seen in front of the Alte Oper in Frankfurt, Germany, Jan. 18, 2024. Snow fell in Frankfurt on Thursday.(Photo: Xinhua)