It is a wetland reserve beside the Johor Strait on the tip of Lim Chu Kang area. You can walk along the paths in the wetland and observe unique animals and trees in a wetland. Monitor lizards may bump into you to give you a surprise (hope your girlfriend will not run away. :)
Go to CCK or Kranji MRT and take bus no. 925. The bus drops by the park on Sundays. On Sat. and weekdays, you need to take a 15 min walk after alighting to reach the park.