When was Iguazu Falls first known to be explored? Other than tourism, how is Angel Falls used today? What is the approximate size of Crater Lake? Explore these and many more questions with Exploring Landmarks Unit 7. This unit focuses entirely on natural landmarks. Included are notebooking pages for each of the seven landmarks featured – Angel Falls, Crater Lake, Denali (Mount McKinley), Iguazu Falls, Kalahari, Old Faithful, and Uluru (Ayers Rock) – along with a true/false quiz and a writing prompt for further study. 11 pages total.