Puget Sound Energy (PSE), the second-largest utility-owner of wind power in the US, has built an elaborate amenity for visitors in the heart of its Wild Horse Wind and Solar Facility, about 2.5 hours southeast of Seattle.

From the project gate — about 20km off the interstate highway — it's a 5km drive up a narrow, winding road to a hilltop in the heart of the 36.4sq