Delhi, the capital of India, is a vibrant city steeped in history spanning over 3,000 years. Its location on the Indo-Gangetic plain makes it a cultural melting pot where ancient traditions and modernity mix. The city is famous for its historical monuments like the Red Fort, Humayun's Tomb and the Qutb Minar, all of which are World Heritage Sites. Delhi is also known for its linguistic diversity, with Hindi, Urdu, Punjabi and English being the major languages. The city has a population of more than 33 million inhabitants in its metropolitan area, making it one of the most populated cities in the world. Its humid subtropical climate offers hot summers and cold winters, with extreme temperatures throughout the year.