Lahore is the capital of the Pakistani province of Punjab and the second largest city in Pakistan after Karachi. It is often called the Garden of Mughals because of its Mughal heritage. Lahore also is often called the cultural heart of Pakistan, as it is the center of Pakistani arts, films and intelligentsia. It is located near the Ravi River, close to the Pakistan-India border. Mughal structures such as the Badshahi Mosque, the Data Durbar Complex, the Lahore Fort, Shalimar Gardens, and the mausolea of Jehangir and Nur Jehan are popular tourist spots in the city. Lahore is also home to many British colonial structures built in the Indo-Gothic style, such as the Lahore High Court, the General Post Office (GPO), and many older universities.