How deep is an average canal?

Yellow Stone National Park is located in which states? What is an express queue at Thorpe park? How do you spell the grand canyon? What sea power became the worlds largest leading mapmaker in the 18th century? Who invinted the roller coaster? What major cities the Rhine run through in Europe? What is the main river in Manchester? What is the name of the organization which looks after the conservation of our sea and fresh water resources? What were the gifts of the Nile in terms of innovation and cultural endurance? What is the ranking of Savannah's Sea Port? Why was the site of pyramid of Giza was chosen by the egyptians? Where is the Great Lakes Museum Of Military Hist in Michigan City Indiana located? Where does a hydroelectricity dam have to be sited? What is the statue of libert's facial expression saying to us? The place where a river rises? What is the Parthenon? What geyser in Yellowstone National Park erupts every 91 minutes? Did the building of the Erie Canal and the national road displace and destroy homes? Is Sweeney Todd the demon barber of Fleet Street educational? Why is the Ozark plateau important?