There are two types of people in this world: those who need to be in control and always know what’s happening, and those who go with the flow and welcome the unknown. The former need not continue reading, as this cruise keeps its destinations a mystery, solved only through a series of riddles (or until you arrive). Scary stuff, huh?

The UK's Bolsover Cruise Club is hosting the Secret Sailaway cruise, an adventure that only tells you the departure and return dates when you buy tickets. With no actual itinerary, all we can say is that there are six secret locations spread out across 16 days, as well as multiple five-star stopovers in some of the world’s best hotels. There's also a possibility that connecting flights will be involved, so basically, the six locations could be anywhere in the world.

To make the mystery even more tantalizing, you have the option of solving riddles to try and guess the locations. Test out your detective skills with riddles like this: “Highly sacred and holy, our natives praise, highest point on the island Still active it displays. From the big smoke have a corporate retreat enjoy a cup of Kopi Luwak from your luxurious seat.” Sounds like something out of Sherlock Holmes, right?

If the suspense is all too much, you can opt to have the locations revealed right when you pay. If you do that, though, you're kind of defeating the purpose and might as well just book any old cruise. Oh, and while we’re on the topic of paying, we do know one more thing: the cost of this awesome experience is $15,000. It’s hard to put a price on adventure, but for a world-wide surprise trip, we reckon it's worth the investment.