off the beaten track

off the beaten track(path) :상도를 벗어난, 특이한

That restaurant's really off the beaten track but worth the trip.

meaning : not well-known or used; an unfamiliar location; unusual; different

origin : In the 1600s, when this idiom was first used, there were many dirt road. As people walked or rode over them, the paths were beaten down by feet, horse' hooves, and wagon wheels. They looked well used. But if something was "off the beaten track" (or "path"), then few people traveled that way. We now use this expression to describe anything unusual, not often, or not seen by many people.
 
* hoof 발굽  beat the hoof [구어] 걷다.