The heavenly water trough - Coulet de la Soulière - Ardèche
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The heavenly water trough - Coulet de la Soulière - Ardèche
The water trough, etched directly into the rock of this small Ardèche pass at an altitude of 800m, is oriented exactly on the North Pole star axis. The one-hour photographic pose shows the Earth's rotational motion around its axis.