Purana Qila
Just south-east of India Gate and north of Humayun's Tomb and the Nizammudin railway station is the old fort, Purana Qila. The massive yet simple, Purana Qila in Delhi has three large gateways. Entering from south gate you'll see the small octagonal red sandstone tower, the Sher Mandal, later used by Humayun as a library. It was while descending the stairs of this tower one day in 1556 that he slipped, fell and received injuries from which he later died. Just beyond it is the Qila-I-Kuhran Mosque, or Mosque of Sher Shah, which, unlike the fort itself is in a fairly reasonable condition. There's a small archaeological museum just inside the main gate, and there are good views of New Delhi from a top of the gate. . The fort offers an impeccable blend of Mughal, Hindu and Afgan architecture, that creates an impressive sight.

Zoo
Established in the year 1959, Delhi Zoo lies near the magical backdrop of famous Old Fort on the southern side of the fort. One of the popular tourist destinations in New Delhi, the National Zoological Park is though an artificial habitat, but one can spot variety of animals and birds from all across the world over here.
The zoo is open daily except Friday, in summer from 8am to 6pm and in winters from 9am to 5pm.

Humayun's Tomb
Built in the mid 16th century by Haji Begum, the widow of Humanyun, Humayun Tomb is one of the most spectacular monements of the mughal era. A rose petal sandstone mausoleum built in proper Mughal style is known to the precursor of world famous Taj Mahal. The elements in its design- a squat building, lighted by high arched entrances, topped by a bulbous dome and surrounded by formal gardens grabs the attention of the visitors. The Humayun's Tomb is protected under Archaeological Survey of India. Other tombs in the garden include that of Humayun's barber and the Tomb of Isa Khan, a good example of Lodi architecture.

Nizamuddin
The shrine of Muslim Sufi saint, Nizammudin Chishti, who died in 1325 aged 92 is placed off Mathura Road near Humayun Tomb. Thousands of visitors from all the religions visit this pious place everyday. The most attractive thing about Nizamuddin Tomb is the large water tank which have fascinated the visitors from all across the world. Every year an 'Urs' is held to celebrate the memory of Nizamuddin Chishti, whose mysticism was not mysterious. It's worth visiting the shrine at around sunset on Thursdays, as it is a popular time for worship, and qawwali singers a start performing after the evening prayers.



Lodi Gardens
Established around15th-16th century by the Sayyids and Lodis, Lodi Garden is situated on the Lodi road. This extremely beautiful garden is a real heaven of tranquility and boasts of splendidly landscaped lawns. The garden has been kept carefully and the area offers rejuvenating experience to the travelers who visit Delhi. In these well kept gardens are the tombs of Sayyid and Lodi rulers. Mohammed Shah's Tomb (1450). Other tombs include those of his predecessor Mubarak Shah (1433), Ibrahim Lodi (1526) and Sikander Lodi (1517). The Bara Gumbad Mosque is a fine example of its type.

Safdarjang Tomb
Beside the small Safdarjang airport, is the Safdarjung Tomb. Safdarjung's tomb was built by Nawab Shuja-ud-Daulah in the year 1753-54. Designed by an Abyssinian architec, Safdarjang Tomb mirrors the splendid Mughal building style in Delhi. The tomb stands on a high terrace in an extensive garden. The exotic garden full of different types of plants and beautiful flowers at Safdarjung's tomb is laid down on the pattern of the Mughal Charbagh style.

Hauz Khas
Situated midway between Safdarjang and the Qutab Minar, Hauz Khas was established by Alauddin Khilji in the year 1284. The word comes from urdu word Hauz which means Pond as this area was once the reservoir for the second city of Delhi, Siri. There are two graves here, one of Safdarjung and the other apparently his wife's. Also part of the old city of Siri is the Moth Ki Masjid, which lies some distance to the east of Hauz Khas. It is said to be the finest in the Lodi style.



Bahai Temple
Also known as Lotus Temple, Bahai Temple is situated to the east of Siri and this exotic building is shaped like a lotus flower which is made with pure white marbles. Built between 1980 and 1986, Bahai temple is a symbol of peace and among the most beautiful architectural temples in India. The temple is open to visitors from Apr. to Sept, daily except Monday from 9am to 7pm, and Oct to Mar. from 9:30am to 5:30pm. Sound & Light Show: There are shows in English and Hindi.. It's well worth making the effort to see this show.

Qutub Minar
Qutub Minar is one of the most visited tourist attractions of Delhi and the tallest monument in India, was built in 1199 by Qutub-ud-Din Aibak. Qutab Minar is 72.5 metres high, has five distinctive storeys and one has to climb 379 steps to get to the top. Built with red sandstone, this tower of victory sports some of the finest carvings and the inscriptions of verses of Holy Quran. However, it is believed by many historians that this magnificent tower was built to signify the beginning of Muslim rule in India. It is also said by the believers that this tower was erected to cast the shadow of God over both east and west. This Minar also served as a minaret to the adjoining mosque and was used by the muezzins to call the faithful to prayer.