Cruise vacations have always divided travelers. People either love or hate the idea of being on a boat with a couple of thousand other people in the middle of the ocean.

Whether you are a skeptic or not, many cruise liners provide passengers with the five-star luxury one might expect from a boutique hotel. Plus you get the added benefit of seeing several locations from the comfort of your stateroom.

Here are some of the world’s most lavish and extravagant liners afloat: