Help me plan something to break up a long drive: We'll be leaving Denver and heading towards Custer State Park in South Dakota (very near Mt. Rushmore). We'll take I-25 North, then highways 18 and 89. We have all day for this not-quite 400 mile drive, so we won't be particularly pushed for time.
Can anyone suggest any interesting diversions on this drive? I don't want to get too far off the interstate, but I'd be interested in any museums, places of cultural interest, parks, etc. that might be fun. I see that our route'll take us by Fort Collins, Greeley, Cheyenne. Even just a fun lunch spot would be appreciated. Our family includes two girls: one a teen, the other a tween.
And another question about this area of the country: While we're in the Mt. Rushmore area we want to visit either Jewel Cave or Wind Cave national park. We don't have caves where we live, so we definitely want to see one, but we probably don't want to see both. They both seem to be conveniently located. Does one have any benefit over the other? Better tours? Better sights? Adjacent features?