A city that was the largest in the Western Hemisphere by 500 AD and had already stood in ruins for centuries when the Aztecs arrived. They did not know who built it and named it the place where men become gods. Beneath the Temple of the Feathered Serpent, archaeologists found a tunnel in 2003 that had been sealed for nearly two thousand years: thousands of objects inside, chambers with ceilings dusted in pyrite to imitate a night sky, and pools of liquid mercury.

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Mount Belukha

The highest point of the Altai, which the Altaians call Uch-Sumer and hold to be forbidden: one did not climb it, or speak loudly at its foot. Nicholas Roerich came here in 1926 and tied the mountain to Belovodye and Shambhala; his paintings made Belukha the centre of a Russian esoteric pilgrimage that has not dried up. The peak stands almost equidistant from three oceans — a fact the esotericists are fond of citing.