Enjoy a morning visit to Red Fort, a UNESCO World Heritage site, followed by lunch at the nearby Karim's restaurant. Spend the afternoon at Chandni Chowk market, which has been around for over 300 years. In the evening, catch the Light and Sound Show at Red Fort.
Start the day with a visit to Lotus Temple, a beautiful Bahá'í House of Worship. Have lunch at the nearby Greater Kailash market, and then head to Hauz Khas Village to explore its art galleries and boutiques. In the evening, visit India Gate and take a walk around the lush lawns.
Visit the world's tallest brick minaret, Qutub Minar, in the morning. Have lunch at the nearby Cyber Hub, a modern open-air commercial hub. Spend the afternoon at National Museum, learning about India's rich and diverse history and culture. In the evening, catch a Bollywood movie at PVR Cinemas.
Start the day with a visit to Akshardham Temple, a modern Hindu temple complex. Have lunch at the nearby Connaught Place, a bustling commercial and shopping district. Spend the afternoon at Humayun's Tomb, another UNESCO World Heritage site. In the evening, visit the Dilli Haat market, famous for its handicrafts and street food.
Visit the largest mosque in India, Jama Masjid, in the morning. Have lunch at the nearby Paranthe Wali Gali, famous for its stuffed paranthas. Spend the afternoon at the Rashtrapati Bhavan, the official residence of the President of India. In the evening, take a stroll around the Lodhi Art District and admire the street art.
Start the day by paying homage to Mahatma Gandhi at Raj Ghat. Have lunch at the nearby Defence Colony market, a hub for designer boutiques and cafes. Spend the afternoon at the National Gallery of Modern Art, which houses a vast collection of contemporary Indian art. In the evening, visit the Kingdom of Dreams, an entertainment complex that showcases India's diverse performing arts.
End the trip with a visit to Dilli Haat to shop for souvenirs and sample street food. Have lunch at the nearby Saket mall, which has a variety of restaurants. Spend the afternoon at the Nehru Planetarium, which offers interactive exhibits on astronomy and space science. In the evening, head to the Hauz Khas Social, a popular rooftop bar with great views of the city.
If you have time, consider visiting the UNESCO World Heritage site of Humayun's Tomb, the National Zoological Park, the Swaminarayan Akshardham complex and the Gurudwara Bangla Sahib. Side trips to Agra to see the Taj Mahal and to Jaipur to experience the Pink City are also highly recommended. To maximize your fun, try taking a rickshaw ride through Old Delhi, attending a cricket match at the Feroz Shah Kotla Stadium, and taking a food tour to sample Delhi's famous street food.