1. Symphony of the Seas – The Largest Cruise Ship in the World

Royal Caribbean's Symphony of the Seas is not just a cruise ship—it's an entertainment metropolis on water. Currently holding the title as the largest cruise ship in the world, this behemoth features 18 decks of activities, dining, and accommodations for over 6,000 guests. Whether you're ziplining nine decks above ground, sliding down the ten-story “Ultimate Abyss,” or enjoying Central Park (yes, a real outdoor park at sea!), the ship offers nonstop experiences. Perfect for families, couples, and group travelers, its two-story family suites even include a personal slide. This ship sails both the Mediterranean and the Caribbean, making it ideal for sunshine seekers worldwide.