To get a sense of the rich history of the Mughal era, visit the walled palatial Agra Fort, one of the famous places in India that is built entirely of red sandstone. Built in 1565 by Akbar, this historical tourist place in India has two ornately designed gates: the Amar Singh Gate and the Delhi Gate. You can only enter through the Amar Singh Gate to uncover an ancient city filled with gateways, courts, passages, palaces and mosques.