Ghantewala Halwai is an icon not only in Delhi, but all over India. Established in 1790, it is considered one of the oldest sweet shops in the country. Ghantewala has served Mughal Emperors, dignitaries, and of course the locals and tourists who scramble to sample the Pista Barfi. The Sohan Halwa, or traditional Persian sweet, is so good that folklore claims it stopped impending battles in the capital. Make sweets, not war.