Steampunk is a sub culture of the marriage between the romanticized 1800's and technology. Wheels, cogs, STEAM, corsets, goggles, hats, and oh so much more.
Steampunk is just a cool genre, with the idea of what the world would be like is internal combustion engines never happened and steam was the source of all power. I have read Steampunk stories and watched a couple of films on YouTube
It's a fascinating subculture to be sure.