About 400 km west of Yekaterinburg, near Beryozniki, lie working potash and salt mines whose walls show dizzying psychedelic stripes of yellow, red, white and blue — the natural patterning of the mineral seams.
Reaching them legitimately is difficult; the trip is for adventurous travellers willing to arrange a permit-only photographic tour. A long way out from Yekaterinburg but the closest major city to start the journey.