Marvel at the intricate craftsmanship of this temple, which showcases Hindu culture, spirituality, and architecture. You can learn about Indian history and values through its exhibitions, gardens, and boat ride. Note that electronic devices are not allowed inside, but you can rent a locker.
Visit the resting place of Mughal Emperor Humayun, a UNESCO World Heritage Site that influenced the Taj Mahal's design. Admire its symmetry, dome, marble, and red sandstone. You can also see other tombs, gardens, and monuments nearby, such as Nizamuddin Dargah and Isa Khan's garden.
Experience the hustle and bustle of one of Delhi's oldest and busiest markets, where you can find all kinds of goods, from spices and sweets to clothes and jewelry. Bargain with the vendors, try some street food, and explore the narrow alleys and hidden gems, such as the Gauri Shankar temple.
Step into the symbol of India's independence and power, where the prime minister gives a speech on Independence Day. Learn about the fort's history, architecture, and significance, admire its red sandstone walls and gates, and watch the sound and light show in the evening. Note that some parts of the fort may be closed on Mondays.
Pay tribute to the Indian soldiers who died in World War I and other conflicts at this iconic war memorial. Take a stroll in the surrounding park, enjoy the breeze and the fountain, and savor some snacks from the nearby food stalls. You can also see the illuminated Rashtrapati Bhavan and Parliament House from here.
Wrap up your day with some nightlife in this trendy and artistic neighborhood. Browse the boutique shops, galleries, and cafes, and then head to one of the rooftop bars or clubs for some drinks and music. You can also admire the lake and the medieval structures, such as the madrasa and the mosque.
You may also want to check out other places such as the Lotus Temple, the Jama Masjid, the Qutub Minar, the National Museum, or the Swaminarayan Akshardham. If you have more time, you can take a day trip to Agra to see the Taj Mahal, or to Jaipur to see the Amber Fort and the Hawa Mahal. To save money, you can use the Delhi Metro, which is clean, safe, and efficient, and offers a tourist card with unlimited rides.