What’s the focus of this passage? [originaltext] The well-known Rushmore Nati

The well-known Rushmore National Monument in the United States is built on the Rush Moore Peak, 1829 meters above sea level. It is a group of huge stone statues of four American presidents, George Washington, Thomas Jefferson, Abraham Lincoln and Theodore Roosevelt. President Washington is the founding father of the country; President Jefferson drafted the US Declaration of Independence; President Lincoln issued the Emancipation Proclamation and President Roosevelt protected the average people’s right to compete fairly with trusts. They were pioneers of the US history.
    The stone statues of presidents were built at the suggestion of a historian in the State of Dakota, with a view to carry forward the US pioneering spirit everlastingly. The statues are 18 meters high, taller than a 6-storied building and larger than the Great Sphinx of Egypt. They are the highest and greatest realistic stone statues in the world. They arc all lifelike and look ahead gravely in harmony with fixed gazes. On clear days, one can have a sight of the four presidents with their firm and steady expression at a distance of dozens of kilometers.
    Since the stone sculpture is unique in style, the Monument is now the U. S. National Art Centre of Popular Education. Groups of people keep streaming everyday to the site for a visit and tourists across the world are also interested in taking a view of this great Monument.