While most of the tours are interesting and take you through some of the most scenic locations in the game, it's worth noting that you don't need need to sit through all stages of a tour.
Once you trigger a stage, you can press O to cancel out of it and triggering the next stage will cause the previous one to count as having been completed. You can either listen to the final stage, or back out and re-trigger a previous stage.
Doing it this way takes around half an hour, though what you'll save in time you'll lose in knowledge.