Explore the 17th century Red Fort, a UNESCO World Heritage Site. Stop by the museum to learn about the Mughal Empire, and visit the Diwan-i-Am and Hamam complexes. Kids will enjoy the sound and light show in the evening.
Marvel at the tallest brick minaret in the world, the Qutub Minar, another UNESCO World Heritage Site. Visit the adjacent Iron Pillar and the ancient ruins of the Quwwat-ul-Islam Mosque. Take a stroll in the landscaped Qutub Complex with the Alai Darwaza and other monuments.
Admire the stunning Lotus Temple, a Bahá'í House of Worship, shaped like a bloomed lotus flower. The large prayer hall can accommodate up to 2,500 worshippers of all faiths. Walk around the serene gardens and water features, and enjoy some snacks at the visitor center.
If you have an extra day, you can add the nearby Jama Masjid, the largest mosque in India, and the colorful Chandni Chowk market. If you have less time, you can skip the Qutub Minar and the Lotus Temple, and opt for the nearby India Gate and the adjacent National War Memorial. Wear comfortable footwear, carry a hat/sunglasses/sunscreen, and drink enough water. Beware of pickpockets and traffic jams.