The Lost World is a book written by Sir Arthur Conan Doyle in the year 1912. In it, Professor Challenger and his companions travel to find a large plateau in South America where dinosaurs still live. After a long journey they find the plateau, and witness not only dinosaurs, but two tribes - an ancient Native American people and ape-men who resemble the missing link.
After many adventures, they return to London and attempt to describe their adventures to a disbelieving public.