For most folks, 10 days at sea is enough, regardless of how many hot towels and Mai Tais the ship’s staff slides your way. But for the intrepid adventurer (read: wealthy person with nothing better to do), even a month-long cruise just isn’t enough.

We compiled data on over 2,000 cruises, including every major cruise line. These 9 cruises stood above the rest as the longest of all, each many times the average cruise length (10 days). You’ll never believe just how long or pricey #1 is…

#9 Longest Cruise