In the morning, explore the beautiful architecture of Humayun's Tomb, which is the tomb of Mughal Emperor Humayun. You can then grab a delicious lunch at the nearby Karim's, which is famous for its Mughlai cuisine. In the afternoon, visit India Gate, which is the national monument of India and a popular picnic spot. In the evening, head to Connaught Place for some shopping and try the street food at the famous Paranthe Wali Gali.
Start your day with a visit to the Red Fort, which was the residence of the Mughal emperors for over 200 years. You can then head to Jama Masjid, which is the largest mosque in India. After lunch, visit the Qutub Minar, which is a UNESCO World Heritage Site and a 73-meter tall tower. In the evening, you can explore the markets of Chandni Chowk and try some delicious street food.
Start your day with a visit to Akshardham Temple, which is a Hindu temple known for its beautiful architecture and boat ride. You can then head to Lotus Temple, which is a Bahai House of Worship and has won numerous architectural awards. After lunch, explore the National Museum, which has a vast collection of artifacts from across India's history. In the evening, head to Hauz Khas Village for some shopping and dinner.
If you have some extra time, you can visit the Rashtrapati Bhavan, which is the official residence of the President of India. You can also take a side trip to Agra to see the Taj Mahal, which is one of the Seven Wonders of the World. To maximize your fun, try to explore Delhi's street food scene and shop at some of the local markets. Don't forget to try some lassi and chaat.