We ran across this in a casino in Las Vegas.  It is about 20 feet tall! There is a white chocolate, milk chocolate, and dark chocolate fountain combined to make one big fountain. The glass parts are custom hand made pieces. It is behind sheet glass to keep the air at about 90 degrees so the chocolate will not harden, the chocolate it self is heated to about 120 degrees if I remember correctly. It looks fake even in real life, until you get as close as you can and actually see the flow of the chocolate go from one glass to another. The flow is so smooth it is hard to detect. Not like water that will easily show the movement.