The photograph on the card was taken sometime in 1890. It shows shipping in the river Daugava towards old Riga. The River Daugava (in Latvian) or Western Dvina, not to be confused with Northern Dvina, is a river rising in the Valdai Hills, Russia, flowing through Russia, Belarus, and Latvia, draining into the Gulf of Riga in Latvia, an arm of the Baltic Sea. The total length of the river is 1,005 km (624 mi): 325 km (202 mi) in Russia, 328 km (204 mi) in Belarus, and 352 km (219 mi) in Latvia. In the 19th century, it was connected by a canal to the Berezina and Dnieper rivers (the canal is currently not functioning). The Daugava forms part of the international border between Latvia and Belarus.
Thank you Merja for this nice card.