Sign Board with message

This picture is taken by my nephew when he visited the museum of train at Ambarawa-Indonesia. He found this interesting sign board with message that it says:
"It takes only one hour...but the memory of your railway mountain tour will last forever."
Me..myself is actually never been to experiencing the tour.
But the interseting is why they specially remind the idea through the sign board.
Well...we have to proove it.