They're miles away from their war-torn countries, and they won't stop until they find a new home.

On Thursday, an estimated 1,200 migrants and refugees set off on foot from a campsite outside the Keleti railway station in Budapest, Hungary, intending to walk west to Vienna, Austria.

The refugees -- many of whom are Syrians fleeing their violence-ridden country -- embarked on the 150-mile journey after Hungarian authorities blocked them from boarding trains headed for Germany, the Associated Press reports .