If you're looking to get introduced to heritage in Delhi, we have just the monument to start with. Humayun's Tomb takes us back to the defeat of the Rajput ruler, Prithviraj Chauhan; when the Delhi Sultanate was established. Under this regime, Delhi was ruled by 7 dynasties, one of them being the Mughal dynasty. Get up close with their customs, practices and architectural style at Humayun's tomb - a marvellous structure that we can't get enough of.

Currently a UNESCO World Heritage Site, it was the first garden-tomb in the Indian subcontinent. It even sparked major architectural innovations and garden complexes, notably the Taj Mahal. 
While you're there, make sure to look up and catch a glimpse of the large octagonal chamber, that has vaulted roof compartments interconnected by galleries or corridors. What adds to the beauty of the stone-clad monument is the red sandstone featuring white and black inlaid marble borders.
Get your tickets to Humayun's tomb and explore the architectural marvel in person.