That happened in Summer 2015 on a highway connecting Liepaja with Riga in Latvia. We were returning home from Liepāja and enjoyed a newly constructed (renovated) Liepāja highway, when suddenly we had to stop our car because of a Swan family walked just in the middle of the highway in front of our car.
Swans looked confused, they were trying to get somewhere, as we later learned - they were searching for a lake.
Swan family walking in the middle of highway
Swan family
Lady helping to lead swans to the lake
Searching for the happiness
Happy ending