Unusual sight can be seen in the San Francisco Bay. When viewed from a distance, the picture resembles the Dutch tulip fields, although vegetation place has an indirect relationship. In fact, the bright spots is nothing but salt ponds that are used for the extraction of salt from sea water. In artificial ponds water evaporates, leaving a crystallized salt, colored algae and micro-organisms, and its shade depends on the degree of salinity
Ponds with low and medium salinity have a greenish or pinkish color, and the higher the salinity, the more water a reddish pigment. Also, the weather also affects color reservoir. In the pouring rain ponds palette changes, and sometimes becomes transparent at all.