Delhi's most famous monument, the Red Fort, stands as a powerful reminder of the Mughal emperors who ruled India. Its walls, which stretch for over two kilometers (1.2 miles), were built in 1638 to keep out invaders. However, they failed to stop the fort being captured by the Sikhs and the British. To take your imagination back to the ancient era, a one hour sound and light show of the fort's history is held each evening.

Jama Masjid is another marvelous treasure of the Old City, and is the largest mosque in India. Its courtyard can hold an incredible 25,000 devotees. The mosque took 13 years to build, and was completed in 1650. A strenuous climb to the top of its southern tower will reward you with a stunning view across the rooftops of Delhi. Be sure to dress appropriately when visiting the mosque or you won't be allowed in. This means covering your head, legs and shoulders. Attire is available there.

Chandni Chowk, the main street of old Delhi, is a shocking contrast to the wide, orderly streets of New Delhi. Cars, cycle rickshaws, hand-pulled carts, pedestrians, and animals all compete for space. It's chaotic, crumbling and congested, but completely captivating as well. As one of the oldest and busiest markets in India, its narrow winding lanes are full of inexpensive jewelry, fabrics, and electronics. For the more adventurous, Chandni Chowk is an excellent place to come to sample some of Delhi's street food.

If you think Humayun's Tomb looks a bit like the TajMahal in Agra, that's because it was the inspiration for the TajMahal's creation. The tomb was built in 1570, and houses the body of the second Mughal emperor, Humayun. It was the first of this type of Mughal architecture to be built in India, and the Mughal rulers followed it up with an extensive period of construction all over the country. The tomb is part of a greater complex that's set amongst beautiful gardens.

QutabMinar, the tallest brick minaret in the world, is an incredible example of early Indo–Islamic architecture. It was built in 1206, but the reason remains a mystery. Some believe that it was made to signify victory and the beginning of Muslim rule in India, while others say it was used to call the faithful to prayer. The tower has five distinct stories, and is covered with intricate carvings and verses from the holy Quran. There are also a number of other historic monuments on the site.

The Bahai Temple is commonly referred to as the Lotus Temple, as it's shaped like a lotus flower. It's particularly pretty at night, when it's attractively lit up. Made out of white marble, the temple belongs to the Bahai Faith, which proclaims the unity of all people and religions. Everybody is welcome to worship there. The tranquil gardens and ponds surrounding the temple are also a great place for a relaxing picnic.

India Gate:- The towering archway of India Gate at the center of New Delhi is a war memorial, built in memory of the Indian soldiers who lost their lives fighting for the British Army in World War I. At night it glows warmly under floodlights, and the gardens that line its boulevard are a popular place to enjoy a warm summer's evening.