Humayun's Tomb in Delhi was built in 1570 and is said to have been the inspiration for The Taj Mahal. This is a magnificent site set in a peaceful garden, said to be the first of its kind in the Indian subcontinent. You enter through a large stone arched gate and walk down a pathway leading towards this monument; a truly tranquil place. I think it is a beautiful place to spend an afternoon and, personally, I was more impressed than the Taj Mahal.