ruins of black taj mahal opposite taj mahal across the river yamuna - the second mausoleum - a tomb for shah jahan from black marb

across agra ancient architecture asia been black blue building constructed culture day destination detail dome exterior famous for from hasnt heritage hinduism historic india indian islam jahan landmark mahal marb marble mausoleum monument old opposite outdoors palace place pradesh religion river ruin ruins second shah sky stone structure taj tomb tourism travel uttar wall yamuna