AmsterdamBy.com
A guide to the city's main public parks and gardens.
http://www.amsterdamby.com/sightsee/sight3.htm

Artis
The official homepage of Amsterdam's main zoo.
http://www.artis.nl/
http://www.artis.nl/international/

Centerparcs
Operates holiday parks for all the family that are open year round.
http://www.centerparcs.com/

De Hortus Botanicus
One of the oldest botanical gardens in the world.
http://www.dehortus.nl/

Dutch Village
A 19th Century Dutch theme park.
http://www.dutchvillage.com/

Efteling
Holland's biggest amusement park.
http://www.efteling.nl/

Het Vondelpark
Find out more about Amsterdam's main municipal park. In Dutch only.
http://www.vondelpark.nl/

Wcities.com
Information on Amsterdam's main parks and gardens, as well as the zoo and the botanical garden.
http://www.wcities.com/en/cat/158/12/category.html