Rotterdam headlines eight departure ports from which guests can visit more than 175 UNESCO World Heritage Sites and 35 countriesSEATTLE, July 31, 2024 /PRNewswire/ -- Holland America Line opened its 2026 Europe season for booking with four ships taking guests on Mediterranean, Northern Europe, Canary Island and transatlantic cruises ranging from seven to 42 days. The carefully crafted itineraries grant travelers a wide array of options and new ports to choose from when booking their European holiday.Explori ...