There were quite a number of bridges that the ship had to pass under during the river cruise. Many of the bridges had a low clearance that required the ship to lower its masts, the large canopy, and at times, the pilot house. During one of these bridge excursions I remained on the top deck and made a video recording of the ship passing under the bridge.
Here's a link to the video I posted on YouTube.
Viking Torgil Barely Passes Under Douro River Bridge