Eden Gardens
These gardens were created in 1840 by the two sisters who were related to the Governor General, Lord Auckland. The idea was to make a Biblical - style Garden of Eden in India. Winding paths intersects the expanse dotted with beautiful trees and shrubs, and there is a large artificial lake. Adjoining the lake is the Burmese - style Pagoda, which was brought to Calcutta from Burma after the British victory in the Burmese war of 1884. Entry is free. Opens  24 hours.

Botanical Gardens
Located 20 km from the BBD Bagh,  the Botanical Gardens was founded in 1787 by the East India Company. They developed it for the collection of plants, indigenous to the country and for the introduction and acclimatization of plants from foreign parts. The main attraction of the 273-acre gardens is a banyan tree, the world's largest, having a circumference of 330m. There are rows of mahogany trees, an avenue of Royal Cuban palms and an Orchid House. These gardens are the biggest in Asia, and the second largest in the world.  Visitors may drive across the bridge and through Howrah, the industrial extension of Calcutta or take a ferry from Chandpal or Tekta Ghats to the gardens. Timings: 9 a.m. - 5 p.m.

Nicco Park
Opened in 1991 and located at Salt Lake, Nicco Park is the first amusement park of Kolkata. There are various rides here such as the striking cars, pirate ships, cable car, moon maker etc. It is a fun place for kids as well as elders. The park is open to the public from 10.00 A.M. to 8.00 P.M. everyday during the winter and 11.00 A.M. to 9.00 P.M. everyday during the rest of the year. There is also a bowling centre nearby.
Jheel Meel,
Sector IV,
Salt Lake City, Kolkata
Phone : 033- 23576052/23578106

Agri-Horticultural Gardens
This garden was founded by William Carey in 1820 and is situated in Alipur, adjacent to Calcutta Zoological Garden. It has a  significant collection of botanical varieties with facilities for gardeners and plant/flower lovers. There is no entry fee. 

Zoological Garden
Calcutta's interesting zoo-the oldest in India-was the creation of Sir Richard Carnac Temple who was Governor of Bengal from 1874 to 1877. It was opened on Jan 1st 1876, by the Prince of Wales. The 16 hectare grounds house a wide species of animals & birds including the rare white Bengal Tiger. There is a separate reptile house and a children's zoo. Migratory birds find sanctuary on a small lake in the zoo every winter. It remains a favourite picnic spot during winter. Directly across the main zoo is an aquarium, with a variety of aquatic life from around the world. Entry by ticket. The gardens are open from 6 a.m. to 5 p.m. daily.