Lahore is the capital of the province of Punjab, and the second most populated city in Pakistan, also known as the Gardens of the Mughals or City of Gardens, after the significant rich heritage of the Mughal Empire. It is located near the river Ravi and the Indian border, Wagah.Due to Lahore's rich history, the mughal and colonial architecture has still been preserved in all its splendour. Mughal architecture such as, the Badshahi Mosque, Lahore Fort, Shalimar Gardens and the mausoleums of Jehangir and Nur Jehan are very popular tourist spots in the city. Various colonial buildings originally built by the British, such as the Lahore High Court, General Post Office (GPO) and many of the older universities still retain their Mughal-Gothic style.