From a U.S. and maybe Canadian perspective, here are stereotypical subtransmission poles (power=pole) carrying low-voltage lines (power=minor_line):
These wooden poles are omnipresent. They usually double as telephone poles, so we call them utility poles.
Pylons for power transmission (power=tower) come in a variety of form factors that vary by region and operator. In some regions, wooden ones are not uncommon. Here are some common form factors carrying mostly high-voltage lines (power=line):