If you want to travel in the tracks of the Prince of Romania and the Prince of Wales in the 1920s, as well as a number of other royal visitors, you may want to take a scenic boat trip down the Hozugawa Rapids in Japan. The scenery is supposed to be beautiful. It's a little hard to tell from black and white postcards, but this old hand-painted one is much more colorful. It was in with the other Hozugawa postcards, so I am assuming that it is the same location, but I can't be sure.
I love how they're all wearing hats.
Here are the backs of the cards in the same order.