A unique free attraction has appeared on Seattle’s waterfront for anyone who wants to visit. A giant round window 5.5 meters (18 feet) in diameter has been installed next to the entrance to the Seattle Aquarium’s Ocean Pavilion, allowing any passerby to peek into the underwater world at no cost. In the huge tank holding about 1.9 million liters (roughly 500,000 gallons) of water, sharks, rays, brightly colored tropical fish and other marine creatures swim, creating a spectacular sight right on the city waterfront.
