It is India's second-most-populous city after Mumbai, and the largest city in terms of expanse. The Delhi Metro is a swift transit system serving Delhi, Gurgaon, Faridabad, Noida, and Ghaziabad in the National Capital Region of India. Delhi Metro is the world's 13th largest metro system in terms of length. Delhi Metro is India's first modern public transportation system, which has revolutionized travel by providing a fast, reliable, safe, and comfortable means of transport. As India's national capital and centuries old Mughal capital, Delhi influenced the food habits of its residents and is where Mughlai cuisine instigated. Along with Indian cuisine, a variety of international cuisines are common among the citizens. Cricket and football are the most popular sports in Delhi.