Andorinha is making its first scheduled cruise along the Douro this week as part of a 12-day itinerary which also includes stays in Lisbon and Madrid.
Guests also got the “surprise” opportunity to enjoy the ship’s official christening ceremony which took place on the third day of the trip.
Tauck chief executive Dan Mahar said: “We work extraordinarily hard to find fun and unexpected experiences for our guests and craft them into our journeys.
“It’s very gratifying to surprise our guests with a sense of wonder and delight, and for this lucky group of guests, we were able to provide an especially memorable experience.”