Sagamiko Resort Pleasure Forest

Roughly an hour from central Tokyo (and not far from Mt. Takao), this mountainside spot lures city slickers with a range of mildly diverting attractions, including a tot-friendly amusement park, a garish athletics course dubbed 'Picasso's Egg' and an outdoor barbecue area, brilliantly named the Wild Cooking Garden. If you are feeling particularly adventurous, try out the frighteningly high Muscle Monster 2 adventure playground, the largest of its kind in Asia.