The conch is understood as the source of all existence -- a cosmic womb, for when the conch is blown, it is said to emulate the primordial sound Aum (Om) from which all else emanates.  

what>  Conch
where>  Krishna Balaram Temple
where>  Vrindavan
where>  Iskcon Temple
where>  India
when>  2005-02-12
when>  19:59:22