We should note that all of these places of thermal extremes (Finnish saunas, Japanese hot baths, American beaches and mountains) have their opposites close at hand. There are possibly two reasons for having the extremes right next to each other.
The first is physiological: the availability of extremes ensures that we can move from one to the other to maintain a thermal balance.
The second might be termed aesthetic: the experience of each extreme is made more acute by contrast to the other.
Works of art which have great life often have intense contrast within: rough/smooth, solid/void, loud/silent, empty/full. It is the difference between opposites which gives birth to something. Contrast is what often gives other principles their degree of life – the intensity of the boundary, the markedness of the alternating repetition.
Contrast strengthens centers by making each a deeper entity of itself, and thereby giving deeper meaning to both. It is, at its simplest, what allows us to differentiate. But meaningless contrast remains meaningless. It is only when centers are actively, mutually, and meaningfully composed that it acts to deepen the whole.
And among such false means largeness of scale in the dwelling-house was of course one of the easiest and most direct. All persons, however senseless or dull, could appreciate size: it required some exertion of intelligence to enter into the spirit of the quaint carving of the Gothic times, but none to perceive that one heap of stones was higher than another. And therefore, while in the execution and manner of work the Renaissance builders zealously vindicated for themselves the attribute of cold and superior learning, they appealed for such approbation as they needed from the multitude, to the lowest possible standard of taste; and while the older workman lavished his labor on the minute niche and narrow casement, on the doorways no higher than the head, and the contracted angles of the turreted chamber, the Renaissance builder spared such cost and toil in his detail, that he might spend it in bringing larger stones from a distance; and restricted himself to rustication and five orders, that he might load the ground with colossal piers, and raise an ambitious barrenness of architecture, as inanimate as it was gigantic, above the feasts and follies of the powerful or the rich.