Humayun’s Tomb

Built during the 1560s in honor of India’s second Moghul emperor, this magnificent monument is perhaps Delhi’s most awe-inspiring sight. Its architecture—with red sandstone arches and slender minarets topped by a soaring white marble dome—was, famously, the inspiration for the Taj Mahal. After visiting the tomb, be sure to spend some time wandering the property’s 30 acres of elaborate Persian gardens.