The Lotus Temple is a must-visit attraction in Delhi. It's a beautiful temple shaped like a lotus flower with 27 petals made of marble. The temple is open to people of all religions and beliefs.
The Red Fort is a UNESCO World Heritage Site and an impressive example of Mughal architecture. It was built by Emperor Shah Jahan in the 17th century and served as the residence of the Mughal emperors for almost 200 years.
Karim's is a famous restaurant in Delhi that serves delicious Mughlai cuisine. It's been around since 1913 and has a loyal following. Be sure to try their signature dishes like mutton burra and chicken jahangiri.
India Gate is a war memorial that commemorates the Indian soldiers who died in World War I. It's a popular spot for picnics and walks and is especially beautiful in the evenings when it's lit up.
The Qutub Minar is the tallest brick minaret in the world and is also a UNESCO World Heritage Site. It was built in the 12th century and has several interesting historical structures in its complex.
If you have more time, you can also visit the Akshardham Temple, Humayun's Tomb, and the National Museum. If you want to take a side trip, you can visit the Taj Mahal in Agra, which is about 3 hours away from Delhi. To maximize your fun, try taking a rickshaw ride through the crowded streets of Old Delhi or go shopping at the bustling Chandni Chowk market.