There's never been a cruise ship like this. Enjoy one-of-a-kind features like an ice-skating rink, the Royal Promenade and a rock-climbing wall. There was only one way to accommodate all of these innovative ideas. We built a bigger cruise ship. The 138,000-ton, 3,114-guest Explorer of the Seas offers more space for every guest - plus enhanced staterooms, expanded dining options and exceptional recreational facilities. This cruise ship is so high-tech, it even features the University of Miami Ocean Lab, a state-of-the-art oceanographic and atmospheric science lab. Explore the University of Miami Ocean Lab.