Foto de stock - 'Bulgaria. It is but rough pasture in the Isker valley, where the Sofia-Plevna railway follows the stream on its winding way', c1920. The Sofia valley is located in central western Bulgaria. The valley was formed by the stream of the Iskar river. From Geographical Magazine, Volume 2, c1920.

Imagen: 'Bulgaria. It is but rough pasture in the Isker valley, where the Sofia-Plevna railway follows the stream on its winding way', c1920.

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