Jaipur is familiarly known as the “Pink City” and is the largest city in Rajasthan. Jaipur was India's first planned city and is now is a major tourist attraction. It is often called the Pink City in reference to its buildings, originally painted pink to imitate the red sandstone architecture of Mughal settlements. Jaipur has many attractions, including UNESCO world heritage sites Amber Fort, Jaipur City Palace, Jantar Mantar Observatory, and Jal Mahal Floating Palace.