I didn't say I live in a place just like Houten, I said I live in a place where you regularly see kids under 10 years old riding bikes together without adults (and like GP said, often with a fishing pole or soccer ball in tow.)

You don't need a place that's the literal "best place for cycling in the world" for this, you just need to (1) build a bike path that's not adjacent to the road (ours is typically 10-20ft away from the road) and (2) have it be along a main thoroughfare where everyone lives a short distance from it.