If you mean what is the field referred to as, then it is the diamond.
A playing field or a diamond.
Las Vegas, I believe, is America's playground. Either that or Cleveland, OH.
The playground of baseball is known as Diamond. A baseball field also called a ball field or a baseball diamond is a field upon which the game of baseball is played. The term is also used as a metonym for baseball park.
Wembley Stadium
Cheese Land!
volley ball court
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 biggest playground in Central Park is Herschler Park, near the Baseball fields and it is right next to the Marrygoround. The best for Celeb Spotting in the Park across the way from the Tavern on the Green, the small Yellow and Red playground.
The Playground Kidders are the playground kidders
2011 Album is Called - Sounds Of A Playground Fading