If your trip to Duenas is all locked in but your travel itinerary is a little on the empty side, let us give you a few hints and tips.Nothing tops visiting new places. While you're in the area, Basilica de San Juan de Banos and Abadia de San Isidro ought to be among them. If you still have tons of stamina and room on your schedule, Bodegas Alfredo Santamaría also awaits.