Article one surveys Meru, Kailash and several Near Eastern and East Asian instances of the world mountain. Zoroastrian cosmology supplies a further case built on a genuinely different astronomical logic, and it is worth setting beside them.
The Avesta names Hara Berezaiti, the "high Hara," later Harburz and the ancestor of the modern name Alborz, as the cosmic mountain around which the sun, moon and stars are said to revolve, standing at the centre of the earth and reaching to the heavens; the god Mithra is described keeping watch from its peak. Unlike Meru's south Asian setting amid concentric rings of continents, the Avestan mountain is bound up with a specific solar and stellar mechanics, the luminaries circling it rather than merely being ranked above it, which reflects a distinct cosmological project rather than a variant retelling of the same idea.
As with Kailash and Meru, a modern geographic range has absorbed the name without settling what the ancient text originally meant by it. The Alborz mountains of northern Iran carry the name today, but scholars of Avestan cosmology are cautious about reading Hara Berezaiti as a description of that specific range rather than as a mythic mountain that a much later geography came to be identified with, the same caution article one raises about treating Kailash and Meru as simply the same object under two descriptions. The pattern recurs often enough across traditions that it is worth stating as a general rule: a cosmological world-mountain and the highest peak a later community can see from where it lives have a strong tendency to get identified with one another, whether or not the original text was describing anything a person could climb.