Why is the forbidden purple city forbidden?

Where is the Fossil Country Frontier Museum in Kemmerer Wyoming located? When was Epcot made? What the longest lake in Wales? What are the best adjectives for the liberty bell? What river forms part of the eastern border between the US and Canada? Is it true England agreed to give all the land east of the Mississippi River except New Orleans and Florida to the US? Is Yellowstone a dangerous place? How many operating rooms in hospital? How has the Volga river changed over the last century? What is the count of rooms in the Leaning Tower of Pisa? Who decided how the Parthenon was used at any particular time? Are there sand dunes in North America? Where is El-Sefarat in Nasr City Cairo? What tributary of the Mississippi begins in western Montana? Why was the statue of Zeus on the Lighthouse of Alexandria? Why is the Mississippi river such an important water way? What can you touch in the boreal forest? Why are the steps of the Great Wall of China uneven? Where is the Gulf of Mexico? What do you get when you cross a vampire with the edge of a river?