The Taj Mahal is located on the right bank of the Yamuna River in a vast Mughal garden that encompasses nearly 17 hectares, in the Agra District in Uttar Pradesh.The Taj Mahal is considered to be the greatest architectural achievement in the whole range of Indo-Islamic architecture.The gate was originally lined with silver, now replaced with copper, and decorated with 1,000 nails whose heads were contemporary silver coins.The uniqueness of Taj Mahal lies in some truly remarkable innovations carried out by the horticulture planners and architects of Shah Jahan.