Autumn foliage turns a curved river valley into a corridor of scarlet and gold.

Evidence

Ah, how beautiful and incomparable the ride up here is, infinitely more beautiful than the much-vaunted parts I have seen elsewhere. There is, first, this beautiful hill-girdled valley of fair savannas, through which the bright St. Vrain curves in and out amidst a tangle of cotton-wood and withered clematis and Virginia creeper, which two months ago made the valley gay with their scarlet and gold. — Isabella L. Bird, A Lady’s Life in the Rocky Mountains, 217

Categorization

• XREF: Connects to the reader’s interest in landscape narrative generally; the seasonal color-memory device could be riffed on.