From Madison Gas Electric:

“Many of us have seen giant wind turbines from the road… but very few people get a chance to go inside. In this story, see what’s in the core and climb with us to the very top of the turbine!

It’s a 26 story vertical climb in a very tight space. See how it’s done and find out how energy is transferred from the blades, into the nacell and down the core of the turbine”