Zoological Gardens
One of the finest in Asia, the zoo spreads over 214 acres. The zoo was designed as an open plan where the wildlife enjoys a natural habitat. More than 2000 animals, birds and reptiles from different countries are homed here.
 
Parliament House
This massive domed structure is almost one kilometer in circumference. The building houses both Lok Sabha (The Lower House) and Rajya Sabha (The Upper House). Tourist can gain access by obtaining a special pass.
 
Purana Quila

(Old Fort): This is the sixth city of Delhi. Located south east of India Gate, it is one of the most prominent monuments in Delhi. Humayun started the fort's construction. But Sher Shah, who drove him out from Delhi, completed the city during his reign (1538-1545). The massive walls and huge gates were constructed by Humayun. The octagonal Sher Mandal and the Quila-i-Koran Masjid were built by Sher Shah.

 
Qutab Minar
Perhaps the most striking monument of Delhi is Qutab Minar. The construction of the 278ft high Qutab Minar was started by Quitubuddin AIbak, the first Sultan of Delhi and Firoz Shah Tughlaq completed it in 1368. In the courtyard of the Quwat-ul-Islam Masjid, there is a 7m high wrought iron pillar that belonged to the Gupta Age. The Pillar withstood centuries of exposure to the nature without rusting, an indication of technological advancement at that period.
 
Rail Transport Museum
The museum has exhibits those show the 140 years old history of Indian Railway. Situated near the diplomatic enclave, the museum is the first of its kind in India.
 
Raj Ghat
The Samadhi where the mortal remains of Mahatma Gandhi were cremated. The Samadhi is amidst a garden with lawns and fountains.
 
Gandhi Memorial Museum

It lies opposite to the Raj Ghat, and houses the personal belongings of Gandhi Ji, photographs and his manuscripts

 
Rashtrapati Bhawan
Formerly the Vice-regal Palace, it is the official residence of the President of India. This 340-room palace and its gardens cover an area of 330 acres. Special permission has to be obtained in advance to visit Rashtrapati Bhawan.

 
Tughlakabad
Tughlakabad is the third city of Delhi and is located about 10km east of Qutab complex along the Mahrauli-Badarpur Road. The fort has fortified ramparts, underground chambers, tall gateways and towers. A prominent structure here is the Ghyasuddin Mausoleum that was built with marble and red sandstone.
 
Red Fort
One of Delhi's most famous historical monuments, Red fort or "Lal Quila" is made in red sandstone and is a seemingly eternal witness to the Mughal splendour and extravagance. It was built by Shah Jahan, the 5th in the line of Mughals. He called the Red Fort in Delhi - the Urdu - I- Mohalla or the Quila - I- Mohalla i.e. the 'fort of exalted dignity' The fort covers a semi-octagonal area of about 2km, its longest walls facing the town in the west and the River Yamuna in the east. Completed in 1648, it contains halls of private and public audience called Diwan-i-Khas and Diwan-i-Am respectively, domed and arched marble palaces, lavish private apartments, a mosque, and highly designed gardens. Diwan-i-Khas is made of marble and its crowning glory used to be the Peacock Throne, which was carried away to Iran by the Persian invader Nadir Shah in 1739.
Each night a Sound and Light show takes place in the Red Fort. The palaces are gorgeously lit with a historical commentary on the aspects of Mughal India. Among the places of interest within the Red Fort that deserve a special mention are the Chatta Chowk, Naubat Khana, Diwan-I-Khas, Diwan-I-Am and the exotic Rang Mahal that was constructed especially for the ladies of the royal home. Shahjahan started construction of this massive fort in 1638. Though the fort was completed in 1648, he never really moved his capital to Delhi as he was kept in confinement by his son Aurangzeb. The fort extends for 2km and the walls are 18m high on the riverside and 33m high on the city side. The main entrance to the fort is through the Lahore gate on the West. You will enter to a covered market known as Chatti Chowk that was once Meena Bazaar, the shopping center for the ladies of the court.
 
Naubat Khana
(Drum House): It is from where the musicians played for the emperor. The arrival of princes and dignitaries were heralded from here.
Diwan-i-Am: The hall of Public audiences is where the emperor listened to the grievances of his subjects and disputes are settled.
 
Diwan-i-Khas
The hall of Private audiences, a structure of white marble, is where the emperor held private meetings and met dignitaries. The famous peacock throne was in this hall before Nadirsha carted it away to Iran
 
Hammams
These royal baths next to the Diwan-i-Khas has three rooms with a fountain in the center. One of the rooms was set up as a sauna.
 
Other places of interest in the fort are
Shahi Burj: A three storied octagonal tower that was once Shahjahan's private working area.

Moti Masjid:
A small Masjid built by Aurangzeb in 1659 for his personal use.

Sound and Light Show
: Every evening, a sound and light show recreates the events of Indian history. The English version starts at 1930 hrs during Nov.-Jan., 2100hrs during May-Aug. and 2030hrs during rest of the year.
Chandni Chowk: This is the main street of old Delhi and a colorful shopping center. At the end of the street there is a Digambar Jain Gurudwara. There is also a bird hospital run by the Jains.