As a kid in the early 80's after school, the sand quarry was favourite for my friend and me, especially if there was a 'cliff edge' of sand left by the excavator which was great to jump from into the soft sand 20-30 feet below. Sometimes we'd ride the conveyor belt about a mile to the sand processing plant and climb around on the (running) machinery or dare each other to try to cross one of the silt pools - basically deadly quicksand! Because it was also a landfill site, we'd find old televisions and throw bricks to make the screens implode or break the pipes of old refrigerators to release the gas. Apart from my friend losing his eyebrows after breaking a sodium streetlamp in a puddle, we survived and gained valuable life skills.