Some of these will take a day, but most can be done in an afternoon.

Pearl Street in Boulder
1. Stroll the lovely Pearl Street Mall in Boulder

The Dushanbe Tea House
2. Have brunch at the Dushanbe Teahouse, an ornate gift from Tajikistan

The Flatirons from Chautauqua Park
3. Wander through Chautauqua Park and enjoy a scenic sunset at the Chautauqua Dining Hall

Flagstaff Mountain view
4. Drive up Flagstaff Mountain or hike into The Flatirons

National Center for Atmospheric Research
6. Explore interactive exhibits at the National Center for Atmospheric Research (NCAR)

The Colorado Rocky Mountains
8. Hike, raft, or zip-line through the Rocky Mountains

Trail Ridge Road
9. Drive along Trail Ridge Road, the highest continuous motorway in the country

Estes Park Aerial Tram
10. Ride the aerial tram to breathtaking views of Estes Park

The Butterfly Pavilion in Westminster
11. Feel the flutters at the Butterfly Pavilion

The Wild Animal Sanctuary
12. See wildlife in a natural habitat at the Wild Animal Sanctuary

Red Rocks Park and Amphitheatre
13. Watch a movie at Red Rocks Park and Amphitheatre while overlooking the Denver skyline

The Colorado State Capitol in Denver
14. Visit the Colorado State Capitol in Denver

Denver Mint coin counters
15. Learn how money is made at the Denver Mint

Larimer Square in Denver
16. Sample some of Denver's best dining, shopping and nightlife at Larimer Square

Garden of the Gods in Colorado Springs
17. Walk, bike, or horseback ride around Garden of the Gods, a National Natural Landmark

Broadmoor Hotel in Colorado Springs
18. Check out the historic Broadmoor Hotel in Colorado Springs

Mount Evans
20. Summit Mount Evans, a 14,265-foot peak, in just a few minutes

Vail Ski Resort
21. Ski Vail, one of the largest single-mountain resorts in the country