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| navigate by keyword : architecture called carved cave corridor crystal deep depth destination disease donbas donbass donetsk entrance grotto health healthy illuminated illumination interior landmark landscape light mine mineral natural nature old passage recreation rock salina saline salt salty sanatorium soledar speleological symphony textured therapy tourism tourist touristic travel treatment tunnel ukraine ukrainian underground view wall |
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| Entrance to the speleological sanatorium called Salt Symphony in salt mine in Soledar, Donbas, Ukraine |
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