An adult-only cruise is a type of cruise that is exclusively designed for passengers who are 18 years of age or older. These cruises are typically geared towards adults who want to enjoy a more sophisticated and relaxed atmosphere without the presence of children.Adult-only cruises often offer more upscale amenities and activities, such as gourmet dining, spa treatments, and live entertainment. They may also cater to specific interests, such as singles cruises, LGBTQ+ cruises, or wellness retreats.If you're considering an adult-only cruise, it's important to do your research and choose a cruise line and itinerary that suits your preferences and interests. Some popular adult-only cruise lines include Virgin Cruise Line, Viking Ocean Cruises, Azamara Club Cruises, and P&O Cruises.