A journey can leave behind more than a route on a screen. A small road journal captures the things that make one day different from another: a quiet square, the light across a hillside or a conversation over lunch. The best entries are usually selective rather than exhaustive.
Write only when you have stopped somewhere suitable. Start with the date and the place, then add three observations. One might concern the landscape, another the architecture and another a sound or smell. This gives the entry variety without turning a relaxed outing into an assignment.
Keep practical information separate from the narrative. A page for parking locations, opening information and useful addresses can be updated later, while the journal entry remains a record of the day as you experienced it. Mark anything that still needs checking before another visit.
At home, choose one photograph and a few sentences to keep together. Leaving out ordinary transitions often makes the memory clearer. A journal should help you return to the atmosphere of a place, not demand that you reconstruct every kilometre.