Explore the exotic underwater world of the Caribbean Sea without getting wet! The Ocean View Explorer–an air-conditioned semi-submersible vessel–cruises above the second largest barrier reef system in the world during your hour and a 15-minute tour. Either ride atop the semi-sub and take photos of the Cozumel skyline or step into the underwater viewing room to sit 4-feet below the water’s surface, spotting colorful tropical fish and incredible coral formations.