I was reminded of this quarter-pipe today by Milo.
Now, just seeing a picture of it again, I can clearly hear the sound it made as we bashed our way up and down it endlessly. Metal, just over 6ft high with a bit of vert, only about 6ft wide, topped by worn wooden coping and a 6 inch platform. At the foot of a slope, bolted to a railing opposite a flat paved bank. It was sketchy at best - and we loved it!
Spent so many hours here. Lots of good times, lots of good memories, met a lot of good friends here too. And made enough scar tissue to last a lifetime.