It is a pool side curtain waterfall that a couple can sit behind/inside.
Using a discarded polished stone kitchen top, iron railing along with curved decorative cinderblock, morter and a spare swimming pool pump I have on hand, it is a simple way to have a nice place to sit behind a cool veil of water.

By placing a $150 ultrasonic mister in the top basin enormous clouds of lighted mist can also be turned on for cool night time effects.

It is 3 ft 6 inches tall inside and about 5 feet wide.

The top is tilted back so a catch basin accepts the water before spilling over in a perfect veil. (getting it perfectly level or adjustable is key)
http://www.angelfire.com/md2/customviolins/poolfalls.jpg

I have no idea if I a overlooking some crucial ingredient but right now it seems pretty straight forward !?