Prison Island Stockholm

Staff lend out play bikes and other play gear on the green, with a grill area, and a playground and wading pool just along the path.

A big swimming spot with two sandy beaches, several jetties, ramps down to the water, a kiosk and restaurant, and a small playground on the sand.

Two sandy beaches with big lawns, a diving tower and Café Kanaan selling ice cream and fika.

A 1600s baroque garden right beside the palace, then an English-style park of ponds, bridges, little islands and big lawns, with the Chinese Pavilion out on the grounds.

The King and Queen's home, on UNESCO's World Heritage list, where kids 4 to 12 can follow a picture hunt through the palace rooms and win a little reward at the end.

Indoor skydiving in a vertical wind tunnel for flyers from age 3, with an instructor beside you the whole time and a flight suit, helmet and goggles provided.