The Planet trail in Utrecht is a day trip through Utrecht and surroundings where you will encounter all planets in our solar system. Of course not in actual size but 1,000,000,000 times smaller, so you can travel the Planet trailon foot or by bicycle. The nice thing about the path is that you can sail about half of the path with a kayak. The route has been chosen in such a way that there is a lot to see along the way, special buildings, including the Sonnenborgh observatory and museum and a lot of nature along the Kromme Rijn and park Rhijnauwen and Amelisweerd.