I watched from my perch (!) on the bench as a muggle dressed in wip-haders (?) attempted this funny muggle sport called fishing. I was tempted to tell her about the "Accio" spell but there is a rule about showing magic to muggles. Then again, if you use the Accio spell, the sport would be known as "catching". As I left her to her struggles, I thought something was missing from this area.
There is an interesting trail system to the right. Follow it to a cement structure as well as pipe of some sort leading over the river. Can't say I understand much about the muggle world.
I would not suggest going here at night. The area has an interesting vibe.