America has it all - mountains, beaches, museums, battlegrounds, forests, deserts, rivers, oceans, lakes, streams, wildlife, cold, hot.... the question is far too broad.
But if I could suggest one place to visit - and I have been all over this great country - make the circle tour around Olympic Pennisula, in Washington State. Some of the most beautiful scenery in this land - and there is alot of it believe me.
Jeff