THE SALINERAS OF MARAS
Towards the northwest of the town of Maras are the famous salineras to where it is possible to be arrived at foot by the pack animal road or car by the earth highway that is almost impassable in the rainy season. The salineras of Maras known by some as "salt mines" are constituted by about 3000 small wells with an area average of about 5 m², constructed in a flank of the inclination of the mountain of "Qaqawiñay", that during the time of drought fills or "they water" every 3 days with salt water that emanates of a located natural manante in the superior part of wells so that when evaporating the water, the salt contained in this one is solidified gradually. That process will continue approximately by a month until obtaining a considerable volume of solid salt, of about 10 cms. of height from the floor, that later is struck and thus granulated; the salt later will be pocketed in plastic bags and shipment to the markets of the region; today that salt is being iodized reason why its consumption is not harmful.
Taken from http://www.qosqo.com/qosqoes/maras.html