From left to right: Prince Vincent, Princess Mary, Princess Isabella, Prince Frederik, Prince Christian and Princess Josephine in Igaliko
Dressed in a nautical striped top, a navy blazer, trousers and wedge heels, Princess Mary posed with her family as they prepared to set off on the trip which will see them stop off at Igaliko, Narsaq, Alluitsup Paa, Nanortalik and Qaqortoq.
Denmark's future king and queen had a blast at the amusement park with their children and nephews having headed out on a bright, sunny day from Grasten Palace in south Jutland, where they usually spend the summer.
Princess Mary boarded the Royal Yacht Dannebrog with her family
Australia-born Mary took charge of three-year-old twins Vincent and Josephine, while Frederik tackled a rollercoaster with Prince Christian, eight, and Princess Isabella, seven, who were both seen screaming and laughing in excitement.
Princes Nikolai and Felix, whose father is Frederik's brother Prince Joachim, also joined the group as did Frederik's cousin Princess Alexandra and her two children.