This is the Mamba Skate Park in South Africa. It's a bit different than any of the other longboard parks I've seen, and honestly it looks awesome.
"The Mamba Skate Park, consisting of 450m of winding, pumping and rolling track through a jungle of trees and thick coastal bush – was conceived by a bunch of fathers wanting to establish a safe-haven for youngsters wanting to exhaust their boundless energy in a sport that develops concentration, poise and confidence in a fast and dynamic communal environment."
It's not the same as bombing a hill, but I think I would have a blast at this park.