My first vacation in American

I spent one months on vacation.I have been to west of American.I have been to YellowStone and Grand Teton Natinoal Park.These two place were shocked to me.There are lot of lush plants full of the whole park.And there are quite a number of lovely animals in the park.Such as yaks，swans，wolfs，bears and so on.when i saw three bears i feel excited.There were eating grasses in the land.They are look so cute，but they are extremely dangerous.