A woman covered in mineral-rich black mud walks on the bank of the Tus lake in Russia's Khakassia region, about 370 km southwest of the Siberian city of Krasnoyarsk, July 18, 2013. Russians from different regions annually arrive at the Tus lake rich with curative black and blue mud to live in a camp, bathe in the bitter-salty water and smear themselves with mud, which is a healing remedy, in their opinion. [Photo/Agencies]