India Gate( dedicated to the memory of the Indian soldiers died fighting during the First World War), Rashtrapati Bhawan (erstwhile palace of British Viceroy), National Museum, National Archieves and Connaught Place – well laid out elitist market once reserved for Britishers only.
Other places in New Delhi which came up prior to British Empire are:-
Gurudwara Bangla Sahib (Sikh Shrine), Jantar Mantar - Astronomical Masonry Observatory by Maharaja Jai Singh II in 1725, Qutub Minar (world's tallest brick minaret) – built by Delhi's Qutb-ud-din Aibak in 1193, Lodhi Garden with tombs of three kings of Lodhi Empire prior to Mughal), Humayun's Tomb in magnificent garden of Mughal period (1565), Safdarjung garden Tomb ( Mughal – 1754) and Birla Mandir (Hindu Shrine built in 1938),
Within the walled city raised by during the Mughal Emperor by Shah Jahan include Red Fort (on the bank of River Yamuna as his Palace and Contonment), Jama Masjid (Royal mosque opposite Red Fort) and Chandini Chowk - oldest markets in Delhi.
Outside Walled city, Purana Qila (Old Fort) and Massive Tughlaqabad Fort (1321 by Tughlaq) were built prior to Mughal Period,
Famous Monuments which came up after Indian independence (1947):-
Lotus Temple (shrine of liberal Muslim Bahai Sect) – Built as Lotus flower designed by Iranian-Canadian architect Fariburz Sahba in 1986 with 27 white petals, Akshardham Temple ( Hindu shrine in Indian classical structural style),
Raj Ghat where the Father of the Nation, Mahatma Gandhi was cremated, Dilli Haat – commercial fair with combination of crafts, food and cultural activity and ISKCON Temple dedicated to Lord Krishna,