24. Red Rocks Park and Amphitheatre – Morrison, Colorado
The Red Rocks Park and Amphitheatre is an open-air concert “hall” that’s surrounded by rock, providing superb acoustics for all of the entertainment that the venue offers (via Oyster). Besides that, exercise enthusiasts tend to run up and down the morning stairs to get their cardio in. It’s usually open between April and November, and you can even visit the Colorado Music Hall of Fame to get a taste of musical history (via Oyster).