Useless fact: the island of Great Britain (209,331 km^2/80,823 sq mi) is smaller in total area than just the state of Idaho (216,444 km^2/83,570 sq mi) here in the Pacific Northwest. A lot of our region is still wilderness, especially Idaho and Montana in the Rocky Mountains. One must likewise travel into the backcountry only with the proper vehicle, preparation, and knowledge. As for distance comparisons, US-2 across Montana is about 666.6 miles (ominous!) or 1,072.8 km. That was a long drive at 70 MPH, so you're definitely in for a trek! People outside Australia and the US just don't comprehend distance the way we do.
Yep, the States is a massive country and with so much space comes wide open and wilderness places just like here in Australia where about 95% of the population live on only 5% of the land. I like it that way though, and the diversity of climate and terrain we have here as well.