Oh jeez, Maroon Bells is as breathtaking as it looks in pictures but wildly better! You can take a short and gorgeous shuttle from Aspen Highlands area to it--- you can either hike along as far as you'd like or just scope out the scenery with a picnic. If you're new to the area, you cannottt miss thiss <3
If you're looking for a more peaceful and tranquil space, we lovee Iron Mountain Hot Springs ( across the street from Glenwood Hot Springs). It has a spa-like feel to it, serves wine and beer and has direct views of the river/mountains as ya soak. You might want to visit this place the day after the wedding : )
If you're in the Glenwood Springs area ( on your way to Carbondale if you're driving from Denver or Grand Junction airports), the Adventure Park and Fairy Caves are one of many things to do in Glenwood. Gorgeous views and a killer time exploring for any age... not to mention gondola rides to take to the top!