US is said that they accomplished what it is today only about 500 years.
But we should not forget Native Americans who have lived in the continent of America.
Before whites' exploration, Native Americans had lived close together with nature and animals.
Even today, World Heriage Sites in US such as Yellowstone and Grand canyon still have majestic views of nature.
A lot of people visit here to see it.
US has a lot of popular sightseeing places.