Undersea Reef Tours' new ship Discovery allows passengers to explore the bottom of the ocean from the hull of its 125-passenger vehicle, where 20 picture windows offer a glimpse into the crystal clear Caribbean waters. The ship, which departs from Cruz Bay, takes passengers on a two-and-a-half hour trek around the shallow offshore reefs and cays near St. John. Here, hundreds of species of tropical fish, rays, sharks and urchins bob and weave in the gentle currents. The experience is ideal for very young children, the elderly, or others who simply want to experience marine life without getting wet – for whatever reason. In addition to the lower-level viewing area, Discovery features two upper decks with both indoor and outdoor seating areas, a bar, snacks, and a captain's deck where visitors can enjoy picturesque views toward St. Thomas, St. John, and the British Virgin Islands. All enclosed areas of the ship are air-conditioned. Tickets cost $47 for adults, and $25 for children 10 and under. Night tours are offered (please call for details). The ship is also available for groups, weddings and special events.