1. Chhatrapati Shivaji Maharaj Vastu Sangrahalaya
Formerly the Prince of Wales Museum of Western India, this Ido-Saracenic structure in Fort was designed by George Wittet and is easily among the most beautiful buildings in the entire city. Step inside the impressive building and you'll find a host of treasures: pottery harking back to the Indus valley, handcrafted Buddhist sculptures from the Maurya Empire, fine latticework on Mughal-era jewellery boxes and more. Fun fact: Wittet also drew up blueprints of the Gateway of India.