From Florida, the ship will travel through the Caribbean, down the eastern coast of South America and on to Antarctica, before rounding Cape Horn and heading to the Chilean fjords. The route will then take the Silver Whisper across the sea to the South Pacific and Australia before it makes its way through Southeast and East Asia, journeying through the Gulf of Aden and the Red Sea. Then it's on to the Mediterranean, before taking on the European section of this extraordinary journey, including ports in Ireland, the UK and the Norwegian fjords.

The first 'world cruise' set sail on Cunard's RMS Laconia almost a century ago, in 1922. The appeal of this type of trip has never dulled, and a world cruise remains one of the great travel adventures. But the irony is, no 'world cruises' have ever really sailed fully around the world. But this will all change in 2020.

Silversea is taking bookings for the 2020 cruise on Silver Whisper now. Full fares include round-trip business air travel, $4,000 onboard spending money per suite, laundry and medical services and unlimited Wi-Fi. Fares start at $62,000 per person – but if you're really gunning for the trip of a lifetime, the Owner's Suite is available for a mere $250,000 per person!

Have you ever been on a cruise for more than three months? What's it like? Let us know in the comments section below.