Faith in the nature and the supernatural is as old as human history. There has always been an urge to move away from the mundane and seek the spiritual. And the outcome has been a plethora of sects, belief systems, religions and sacred places.
People used to traveling long distances as pilgrims, seeking peace and reinforcing faith. This probably makes pilgrimage the most ancient form of organized travel.
But in this fast changing world, visits to religiously sacred places are not limited to spirituality or faith. Many frequent sacred sites looking for both religious and recreational needs. They are motivated by anything ranging from ardent faith to plain curiosity.