The claim that the Wall is 300 miles long is further supported in Game of Thrones: A Telltale Games Series, where Britt Warrick says to Gared Tuttle a 300-mile wall, and you're still in my way. The game is canon to the show so it is possible that Sam was wrong.
One of the most respected collections of museums in the world, the Smithsonian Institute is an inspiring attraction for kids, teens and adults. Comprised of 19 different museums, art galleries and research centers, the Smithsonian collection is centered around the National Mall - and admission is always free. The most popular Smithsonian museums include the National Archives, National Zoo, National Museum of Natural History and the National Air and Space Museum.
Smithsonian Museums in Washington, DC. History, science, art and culture come alive at these DC museums. Collectively called the Smithsonian Institution, this world-renowned museum and research complex in the District consists of 17 museums, galleries and a zoo. Explore and learn about everything from the origins of man and the future of flight to the history of art across multiple continents with nearly 140 million objects, works of art and specimens to discover.