The largest skateboard ramp in the world can be found on a 12-acre farm north of San Diego among the green foothills of the San Marcos Mountains.

Pilots routinely adjust their flight paths for a closer look, which is as good a way as any to sum up the scale of the Mega Ramp. The wooden structure is longer than a football field, as tall as an eight-story building, with a creek bed running through a 70-foot breach.