What are the five shortest dams in the world?

How many light houses does Michigan have? How many people visit the leaning tower of Pisa per month? Is there fresh water jellyfish in lakes? Why do some factories waste water goes to seas and rivers? Where did yadkin river get its name? What is the oldest lake in the world? Whats the length of the longest river on earth? How far is laughlin from Grand Canyon? Is the expressionless in the cedar senai real? What under sea animals can use poison? Where and when did mt fuji occur? Can tourism be sustainable? Where in the bushes under the Lincoln Memorial on a five dollar bill is the number 172? Types of coral? Is every word capitalized in Empire State Building? How much water does Canada's wonderland use a year? How many square miles is busch gardens? How far is the swim from Alcatraz to the mainland coast? Where is the Michael j fox theater? What is the widest and deepest points of the Tar River?