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Port Jackson in Sydney, Australia, is the deepest natural harbor in the world. The harbor has a perimeter of around 200 miles, and in some places it's 100 feet deep. It is also home to 550 species of fish, making it one ... More »

Sydney Harbour in Australia is the largest natural harbor in the world. It is also the location of many of the city's main attractions, including the Sydney Opera House, the Sydney Aquarium and the Sydney Harbour Bridge. More »

Pearl Harbor is located on the island of Oahu in the state of Hawaii. Pearl Harbor refers to both the natural harbor in the island of Oahu and the American Naval base located there. More »

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Sydney Harbour in Australia is the largest natural harbor in the world. It is also the location of many of the city's main attractions, including the Sydney Opera House, the Sydney Aquarium and the Sydney Harbour Bridge. More »

Lake Baikal in Siberia in Russia is the deepest lake in the world with a depth of 5,387 feet, or 1,642 meters. It also holds the greatest volume of freshwater of any lake in the world, containing approximately 20 percent... More »

The Congo River in Africa is the deepest river in the world at 820 feet deep, according to The World Geography. It flows from its origination point within the Altai Mountains all the way to the Atlantic Ocean. More »

The deepest ocean in the world is the Pacific Ocean with an average depth of 13,740 feet. The deepest point in the Pacific Ocean is the Mariana Trench at 36,200 feet. More »