Actually crores of people worldwide come in the ocssion of Kumbh Mela to take a holy dipin Ganga & Yamuna Sangam,i.e.,Prayag.One of the holy occassions are considered to be the Poush Sankranthi around Jan 14..there are other dates also,but what is appreciable is that in this time around temperature of ALD will be around 3-4 degrees C,still devotees w/o caring dip into the Holy Prayag even from Night 3 am....Kumbh Mela is considered to be the largest gathering of people anywhere across the world for some religious purpose.You must have heard in Bollywood Movies,about Brothers who got separated in Kumbh Ka Mela.