Kajplats 19, Strandvagen, Östermalm
The Swedes are particularly skilled at giving just about everything, from their buildings to their food, a sustainability edge. GoBoat is the city's environmentally focused picnic boat company, developed to enable tourists and locals to take full advantage of the water that surrounds and divides Stockholm (really, fourteen separate islands connected by bridges). The family-sized navy motor boats themselves are made of recycled plastic, run on solar-powered batteries, and have sturdy wooden tables and benches built right in. Pack up a picnic (shop for the best sandwiches and fixings at Ostermalms Saluhall), choose your route, and enjoy lunch with a side of some of the best views this part of the world has to offer—the perfect activity whether you're traveling with the kiddos or not.