it is commonly known as yishun dam, if i'm not wrong.
1st time went there for routemarch, super xiong, but find tt place
quite nice especially ard 6-7pm, during sunset (the sunset, the
breeze, the trees, n most importantly not alot of ppl).
too bad no toilets n shelter down there, but can go to the small
ulu road at the end of the damn on the seletar side and do ur
business by the roadside (but exercise caution).
yishun ave 1 indeed quite ulu, but not tt spooky, once saw a female
jogger running alone, so shld b quite safe, gd to go wif someone
cos the walk there realli quite long... went there once on a sat
evening, n there's an icecream man selling icecream(dunno still
ard). wah damn shiok to have icecream after the long walk.