A journey is a trip from one place to another, usually taken over quite a long time. The word journey can also be used to describe progress from one state to another, for example a weight loss journey. The people in the picture are on a bike journey. A similar word to journey is travel or trek.
You travel when you move from one place to another. You can travel in any way, by walking, riding a bike or by driving a car like you see in the picture.
To trek is to travel somewhere, but slowly and with difficulty. The man in the picture is trekking through some mountains.