For my birthday, I went to Dig This to play in the dirt. Here's me operating a Catapilliar 215C excavator!
I dug to China, well maybe ten feet in that direction. I picked up and stacked giant boulders. And I knocked down piles of earth by driving over them with 15 tons of hydraulic muscle and steel track. It was loads of fun!
DigThis - "The first ever heavy equipment play arena" http://digthis.info