Sven Zacek / Flooded meanders of Halliste River, aerial view. Soomaa National Park, Parnumaa, Western Estonia. October 2017.

Sven Zacek / People walking on Oosaar islet before an autumn storm. Vainamere Nature Reserve, Gulf of Riga, Parnumaa, Western Estonia. October 2018.

Sven Zacek / People on beach and in shallow sea. Parnu, the summer capital of Estonia. Parnumaa, Western Estonia. July 2010.

Sven Zacek / People sunbathing on beach. Parnu, the summer capital of Estonia. Parnumaa, Western Estonia. July 2010.

Sven Zacek / Trees standing in spring meltwater. Soomaa National Park, Parnumaa, Western Estonia. March 2015.

Sven Zacek / Bog with pool and islands in morning light. Nigula Nature Reserve, Parnumaa, Western Estonia. August 2016.

Sven Zacek / Bog pool with islands and surrounding wetland, in morning light. Nigula Nature Reserve, Parnumaa, Western Estonia. August 2016.

Sven Zacek / Flooded and frozen Halliste River. Soomaa National Park, Parnumaa, Western Estonia. December 2017.

Sven Zacek / Common blue damselflies (Enallagma cyathigerum) pair, in flight over bog pool, Nigula Nature Protection Area, Parnumaa county, Estonia.

Sven Zacek / Frozen forest after winter flooding, Soomaa National Park, Viljandimaa county, Estonia. February.

Sven Zacek / Aerial view of spring melting on the sweeping bends of Lemmjagi River, Soomaa National Park, Viljandimaa County. Estonia, February.

Sven Zacek / Aerial view of the sweeping bends of Halliste river, Soomaa National Park, Western Estonia. February.