Las Vegas, I believe, is America's playground. Either that or Cleveland, OH.
Cheese Land!
volley ball court
Wembley Stadium
A playing field or a diamond.
If you mean what is the field referred to as, then it is the diamond.
I'm not positive but I think its WrestleMania
If you are talking about the swirly pole thing, they are called corkscrew climbers.
its because there is a website called math playground
The Playground Kidders are the playground kidders
2011 Album is Called - Sounds Of A Playground Fading
it is called a tire swing