What magical land does Dorothy Gale travel to in the famous story?

The Wonderful Wizard of Oz is a 1900 children's novel written by author L. Frank Baum and illustrated by W. W. Denslow. It is the first novel in the Oz series of books. A Kansas farm girl named Dorothy ends up in the magical Land of Oz after she and her pet dog Toto are swept away from their home by a cyclone. Upon her arrival in the magical world of Oz, she learns she cannot return home until she has destroyed the Wicked Witch of the West. The ground-breaking success of both the original 1900 novel and the 1902 musical prompted Baum to write thirteen additional Oz books, which serve as official sequels to the first story. Over a century later, the book is one of the best-known stories in American literature, and the Library of Congress has declared the work to be "America's greatest and best-loved homegrown fairytale".

Source: Wikipedia