Red Fort
The Mughal Empire's grandest fortress, now the symbolic heart of Indian nationhood.
Red Fort — Lal Qila in Hindi — is a massive 17th-century walled palace-fortress built by Mughal Emperor Shah Jahan and completed in 1648. It served as the seat of Mughal power for nearly 200 years, and today it carries a significance that goes far beyond its architecture: every year on Independence Day, India's Prime Minister addresses the nation from its ramparts. That combination of imperial grandeur and modern national identity makes this one of the most loaded historical sites in Asia. It was designated a UNESCO World Heritage Site in 2007.
Inside the 2.4-kilometre perimeter of red sandstone walls, there's a lot more than most visitors expect. You enter through the Lahori Gate and walk through the covered bazaar street called Chatta Chowk — once a royal market for silks and jewels — before reaching the main ceremonial grounds. The Diwan-i-Aam (Hall of Public Audience) and the Diwan-i-Khas (Hall of Private Audience) are the architectural highlights, the latter famously housing the Peacock Throne before it was looted by Nadir Shah in 1739. There are also royal hammams (baths), a mosque, and manicured gardens to wander. A sound-and-light show runs in the evenings.
The fort sits right on the edge of Chandni Chowk, Old Delhi's chaotic and wonderful bazaar district, so a visit here pairs naturally with an afternoon exploring the lanes, eating street food, and visiting the Jama Masjid nearby. Come early — by 10am the crowds and the heat are both building. Foreigners pay a higher entry fee than Indian nationals, which is standard across major Indian monuments. Skip the fort's own museum if you're pressed for time; the architecture itself is the main event.