Driving the cattle through Hortobágy

mere:  puszta, merő, egyedüli

Click here to learn more about this event:  Hortobágy and bulls

The regular flooding of the Tisza provided local farmers with fertile pastures for their herds and allowed for Hungarian Grey Cattle to be exported to Western-Europe in the 16th and 17th centuries.

Important trade roads were established for this activity. These roads later became known as the "salt-roads" on which salt was transported from the salt mines of Transylvania. 

Hortobágy, steppe region in east-central Hungary. It lies between the Tisza River and the city of Debrecen.

150 centimeters is 4'11". Since the caption says "about" 150 cm, I'll
call it 5' even.  Weight of 900 KG is about 2,000 lbs.

Kuvasz male is about 75 cm. That's about 2-1/2 feet or 30 ".