Ninja Warrior UK Adventure Park, Watford

This is the Woodside Leisure Park site, an indoor obstacle course park where children climb, balance, jump and swing their way across obstacles taken from the ITV series. The Warped Wall is the centrepiece, and there are inflatable attractions alongside the main courses. It works well for mixed age groups and for parties, and the surrounding leisure park gives other options if you want to make a longer trip of it.