Answer: The Eiffel tower
Explanation: The Eiffel Tower was supposed to be torn down after 20 years. As mentioned before, the Tower was built with the intent of showing off France's industrial prowess during the World's Fair, but the plan was to tear it down after 20 years.
Hernando de Soto discovered the Mississippi River in 1541. Hope this helps! :)
The candidate's debates are put in place for the voters to decided who they want to represent their party in the General Election. In order to become the representative for president for the Republicans or the Democrats, you must win a certain amount of delegates rewarded for winning states.
In 1860, you could only go as far west Omaha, Nebraska.