Haiku structure
I love Haiku that are Haiku. The problem with the Westernised version is that it's usually not anything more than a hollow, distorted misrepresentation. Often mistakenly seen as a simple poem, original Haiku hide several layers of complexity behind a deceptively simple facade. The final verse is intended to reveal a profound truth or poignant thought, while the first 2 lines intend to place 2 basic subjects in juxtaposition (commonly split by exclamation or punctuation, i.e. 'cutting'). The reveal is often an unusual observation of interaction, or the result of a comparison between the subjects.
>subject one goes here<
>and here the second subject<
>insert profound truth<
An alternative structure is to cut via the entire first line with an exclamation or supposition, and then lead to the reveal to show how subject 1 (now in line 2) affects subject 2 (final line).
That said, I'm no purist--experimentation, breaking convention, these are important in poetry (but it is equally important to know what conventions are being bent/broken)--there are also those that believe the whole 5-7-5 concept is a misconception; indeed, it seems purely to be a self-imposed 'arithmetrical' element observed by English language Haiku-ists. Personally, I feel that limitation subtracts more from the form and its original intention than that it adds.
Ancient valleys—
glass and steel structures,
myth nowhere between.
It also saddens me that such a beautiful and meaningful art-form has been reduced in many cases to a medium for parody. It's a sorry, sorry thing to note that in our assimilation (better said appropriation) of such things, we tend to strip away most of what makes that something special. Yet we celebrate that... Sorry for being a party pooper