Take a little (virtual) trip
I love Google street view. When I was searching for a place to live in the Little City and was still living two hours away, I used it a lot to check out the neighborhoods where apartments were listed. It helped narrow down the search somewhat.
So I was pleased to find out, you can now get Google street views for national parks. There's links for five different ones at the end of the linked article here. That may be the closest I get to any of them.