Humayun was the second Mughal emperor. The United Nations Educational, Scientific, and Cultural Organization (U.N.E.S.C.O.) designated the tomb as a World Heritage Site because the builders were the first to incorporate the essential design elements that are used in the tombs that dot north India, culminating in the Taj Mahal. These tombs are all elaborate buildings set on raised platforms amidst large gardens. The Mughals ruled much of India for about 175 years. Humayun himself
was educated, speaking three languages and becoming ruler of a province at age 12.
The Archeological Survey of India has not gotten this one to the same level of repair as several others I saw. There's a second tomb building on the grounds, but I cannot remember to whom it belonged. Guide walked me in, gave me a few pitches about the place, and then left me to wander around the building myself. The platform level is open to the public, but the upper levels are not. Mostly it just seems like a place to play hide and seek. There are a number of cenotaphs in the building, so I am not sure which of them belong to Humayun. Course, I don't think it matters much if I know exactly which one.