Summer 2015 will mark Royal Caribbean International’s 26th year in taking vacationers to experience the immense unspoiled wilderness of Alaska. Royal Caribbean will deploy two Radiance-class ships, Radiance of the Seas and Jewel of the Seas, to the Last Frontier and offer more oceanview and balcony staterooms for guests to take in the unfolding landscape on an Alaska vacation.

For a more immersive Alaska experience, vacationers also can choose a Royal Caribbean Alaska Cruise Tour to explore deeper inland and encounter the multitude of wildlife that call Alaska home, or delve into the beauty and exceptional towns and cities of the Canadian provinces of Alberta, British Columbia and the Okanagan Wine Valley. Radiance of the Seas and Jewel of the Seas’ 2015 Alaska seasons are now open for bookings.

Additionally, Royal Caribbean announced that Rhapsody of the Seas and Splendour of the Seas will join Anthem of the Seas, Allure of the Seas, Adventure of the Seas, Brilliance of the Seas, Serenade of the Seas and Vision of the Seas to total eight Royal Caribbean International ships to sail Europe in summer 2015.

Rhapsody of the Seas and Splendour of the Seas will take guests on a range of Greece, Turkey and – for the first time for the cruise line – Black Sea itineraries that unveils the unique colors and cultures of the region. Rhapsody of the Seas and Splendour of the Seas’ summer 2015 Europe seasons also are now open for bookings.

From May to early-September 2015, Radiance of the Seas will alternate northbound and southbound Alaska and Hubbard Glacier cruises, both seven-night itineraries from Vancouver, B.C. and Seward, Alaska, respectively. Guests will cruise the Inside Passage and by Hubbard Glacier, and call at Ketchikan, Icy Strait Point, Juneau and Skagway. On a special Sept. 4, 2105, sailing, Radiance of the Seas will sail a seven-night round-trip itinerary from Vancouver; cruise Tracy Arm Fjord to Sawyer Glacier; and call at Icy Strait Point, Juneau, and Ketchikan. For its part, Jewel of the Seas will sail seven-night round-trip itineraries from Seattle, Wash., which cruise the Alaska Inside Passage and also Tracy Arm Fjord to Sawyer Glacier, and call at Juneau, Skagway, and Victoria, B.C.

Additionally, vacationers can select among four Jewel of the Seas’ sailings that explores the California Coast, ranging from six to eight nights in duration, at the beginning and end of the ship’s Alaska season. Furthermore, a 14-night westbound Panama Canal sailing, departing May 2 from San Juan, Puerto Rico to San Diego, and a 15-night eastbound trans-Canal sailing, departing Oct. 10 from Los Angeles to San Juan, will bookend Jewel of the Seas’ 2015 Alaska and California season.