The maple trees setting off the river and the famous old wooden Togetsukyo Bridge make it very popular with local tourists, so it is worth avoiding on Sundays and public holidays.
The togetsuko is the oldest bridge in Japan. 
mnli hypothesis: The togetsuko is the oldest bridge in Japan.  premise: The maple trees setting off the river and the famous old wooden Togetsukyo Bridge make it very popular with local tourists, so it is worth avoiding on Sundays and public holidays.