Zamzam is the name of a famous well in Masjid al-Haraam in 
                  Makkah, close to the Ka'bah. Muslims regard the water of Zamzam 
                  as revered and unique. Those who go to the sacred lands of Makkah 
                  and Madinah return home carrying it for thousands of miles as 
                  a prized possession. They drink it in abundance and give it 
                  as a special gift to friends and family. 
                It is unique in many ways : how it came to being in the middle 
                  of the desert, the beneficial qualities it has, the fact that 
                  it is far away from any other source of water, the fact that 
                  it has never dried up despite providing water to millions of 
                  thirsty pilgrims every year and despite it being distributed 
                  worldwide to millions of people. 
                Zamzam water has scientifically been proven to contain healing 
                  qualities due to its higher content of calcium, magnesium and 
                  natural fluorides. It is also an established scientific fact 
                  that water wells tend to grow algae, especially in warm climates. 
                  This is not the case with the well of Zamzam. It has remained 
                  free from biological contamination for countless of years.
                History of Zamzam 
                Ibraahim came with his wife, Hajira, and his son, Ismail Alaihimus 
                  Salaam, to Makkah where he left them with some dates and water. 
                  When these had been consumed Hajira Alaihas Salaam left her 
                  son at the bottom of the valley and ran from Mount Safa to Mount 
                  Marwa in search of water. When she had done so seven times she 
                  suddenly heard a noise. She came down to her son and saw an 
                  angel striking it's wings on the desert sand. Water miraculously 
                  issued from the spot. She drank to her fill and fed her baby. 
                  A tribe from Yemen, the Jurhum, settled in the area and the 
                  area came to be the centre of activity. 
                In the course of time the well was lost. Years later Abdul 
                  Muttalib, the grand father of the Prophet Sallallahu Alaihi 
                  Wasallam was commanded in a dream to dig at a specific point 
                  around the Kabah. The well of Zamzam was once again found and 
                  has continued producing water to this day. 
                Virtues of Zamzam water
                Zamzam was the first of the fruits from the dua of Ibrahim 
                  Alaihis Salaam for the area. It was the sole reason why the 
                  Jurhum settled in Makkah and it grew to become a city. Zamzam 
                  is the most precious water on earth. With it the heart of the 
                  Prophet Sallallahu Alaihi Wasallam was washed on a number of 
                  occasions. It has been blessed with the saliva of the Prophet 
                  Sallallahu Alaihi Wasallam. It is a cure for sickness. It has 
                  been the point of supplication for the righteous and pious for 
                  ages. 
                Two angels washed the heart of the Prophet Sallallahu Alaihi 
                  Wasallam with Zamzam when he was a child. Scholars have mentioned 
                  that this was done to make him stronger so that he could see 
                  the heavens, earth, paradise and hell, because one of the special 
                  qualities of Zamzam is that it strengthens the heart and calms 
                  the soul. 
                How to drink Zamzam
                It is sunnah to drink Zamzam water and to quench one's thirst 
                  with it. The scholars have mentioned that it is mustahab (recommended) 
                  to drink water with the right hand, to face the Ka'bah, to say 
                  Bismillah before drinking, to pause and take a breath three 
                  times while drinking, to drink to one's fill, to praise Allah 
                  after one finishes and to make an abundance of dua while drinking. 
                
                The Prophet Sallallahu Alaihi Wasallam said: "The water 
                  of Zamzam is for whatever purpose it is drunk for." (Ibn 
                  Maajah)