Far below a number of people seemed to be dancing, and music filtered through the dome....

Graham fancied he heard a shouting through the snowstorm, and his guide hurried him on with a new spurt of haste.

They clambered panting to a space of huge windmills, one so vast that only the lower edge of its vanes came rushing into sight and rushed up again and was lost in the night and the snow.

They hurried for a time through the colossal metallic tracery of its supports, and came at last above a place of moving platforms like the place into which Graham had looked from the balcony.

They crawled across the sloping transparency that covered this street of platforms, crawling on hands and knees because of the slipperiness of the snowfall.
For the most part the glass was bedewed, and Graham saw only hazy suggestions of the forms below, but near the pitch of the transparent roof the glass was clear, and he found himself looking sheerly down upon it all.