'마음이 가다' is an idiomatic phrase which means 'your feelings or thoughts incline to something'. '마음이 가는 곳' means 'the place or the thing that your heart or mind wanders'. Here are more examples with similar expressions. 마음이 가는대로 하세요. (Please listen to your heart.) 저는 여행할 때 그냥 제 마음이 가는 곳으로 아무 곳이나 가요. (I just go to anywhere I feel like going when I travel.)

I guess this phase may means the place where you always looking forward to go.