Visitors can come face-to-face with one of Europe's largest collections of sharks in one of the world's longest underwater tunnels at Deep Sea World, Scotland's National Aquarium. With more than 40 displays, including the 4.5-million-litre underwater safari with its walk-through tunnel, the centre is home to hundreds of fascinating creatures, ranging from seals and turtles to stingrays and giant sand tiger sharks. Visitors can discover the mysteries of the deep with a huge selection of creatures to gaze at in the enchanting underwater tunnel.