What year was the macha piccha built?

Why has the completion date of china's three gorges dam important to tourism? How long is the blue streak at cedar point? Are red rock canyon and grand canyon different? Why is lake Victoria black? Where is the Commerce Twp Area Historical Society in Walled Lake Michigan located? Where is the Jeffersontown Museum in Jeffersontown Kentucky located? Where is the golden gate brige? What is a river channel on a delta called? What is the tv show called about a group of people living after a plane crash in the Amazon or Bermuda triangle which is about 10 years old? How did the people of the Tigris and Euphrates river valleys interact with their environment? How many animals at the Melbourne zoo? Are there shells in an ocean floor? What is under the statue of libertys arm and what is on it? The Niger River empties into what ocean? When was Game Park created? What land is closest to the Atlantic Ocean? Why is mount Everest could mount Everest? How does rock that form at a mid-ocean ridge become magnetized? Does the desert rat have a streamlined body? What are common North Carolina beach snakes?