Exclusive pre-sale for two World Cruises in 2021 now open to current and future world-cruising guests Monaco, France, 2019-Jan-31 — /Travel PR News/ — Silversea Cruises continues to push boundaries with the announcement of two pioneering World Cruises in 2021, including the world’s first ever Expedition World Cruise. Offering distinct sets of experiences and differing ways… Read the full press release