Compare to my country

I knew about "U.S is very big nation"
Compare th my country, Korea has 4 seasons. Every region has a similar climate. but just one state in U.S has different climate. For example L.A in C.A. is warm now but Tahoe where I went last weekend it was very cold, besides there was snow. So I was surprised.
And Korea has similar culture in every region. But U.S has very different culture in each region. Because I think U.S has very extensive size area and several races. By the way, U.S has very many tourist attractions. So I want to take a trip around the U.S
I think, the U.S has a great charm for tourists.