To find this bridge, you essentially park at the Princeton Battlefield Park and walk all the way down towards the woods (you'll pass an old house if you're going the right way). When you enter the woods there will be a tight trail but it will quickly open up. When it does, you want to take a left and walk all the way down until you start to see a building and a pond. In that case, take a right turn and walk all the way to the end of the trail. If you don't see the bridge at the end of the trail, you have probably taken a right too early, but continue walking left following the creek. Eventually after following the creek, you'll encounter this bridge. 

The bridge was redone about a year ago, so don't worry, it is safe. It's an artsy type of bridge and I really enjoy the vibes around this place. It's usually calm, no one hangs around it, and it's just appealing to look at. My friends and I usually sit at the edge of the bridge and, more often than not, no one comes or bothers us. 

The trails leading up to the bridge are family friendly, and many people walk their dogs or go for jogs there, which is also recommend. Personally, I usually go there with my friends if we have nothing better to do, which usually turns into a bonding time with nature.