India's first underwater metro in Kolkata records over 70,000 passengers on first day
A total of 23,444 persons boarded at Howrah Maidan, while 20,923 passengers boarded at Howrah, which is the deepest metro station in India. The Howrah Maidan-Esplanade metro section, which passes below the Hooghly river, is a 4.8-km stretch.