Best Park to Begin a Hike [1]: Boulder’s Chautauqua Park [1] has a historic theater used for summer music festivals, a restaurant, a playground, and cabins, and is also the starting point for dozens of stellar hikes.
Best Get-Smart Hike [2]: The National Center for Atmospheric Research [2] has many scientific displays inside, but also offers the Walter Orr Roberts Weather Trail with signs that tell about local weather.
Best Opera Venue [3]: The Central City Opera House [3] is both a historical attraction and an excellent place to see a performance.
Most Refreshing Hike [4]: The Bluebird Lake Trail [4] on the south end of Rocky Mountain National Park passes by Ouzel Falls, Ouzel Lake, Calypso Cascades, and Bluebird Lake. Although it can be a difficult hike, it is the perfect respite from a hot summer day in the city.
Best Red Rocks [5]: Whether you choose to see Garden of the Gods [5] near Colorado Springs on foot, by car, on horseback, or by mountain bike, you will be awed by the natural beauty.
Best Free Drinks [6]: The Mineral Springs [6] are one of the best attractions in Manitou Springs. The spring water trickles from decorative spigots and fountains around the historic town. Anyone can bring a cup or bottle and drink as much of the potentially healing waters as they want.
Best Way to Get to the Slopes [7]: The most scenic and relaxing way to get to the Winter Park Ski Resort is the Ski Train [7].
Best Cross-Country Skiing [8]: Devil’s Thumb Ranch [8], just 15 minutes outside of Winter Park Ski Resort, is a gorgeous and peaceful valley exclusively for cross-country skiing and snowshoeing in winter.
Best Alpine Garden [9]: Billed as the highest botanical garden in the world, the Betty Ford Alpine Gardens [9] in Vail are a beautiful example of what grows, blooms, and thrives at a high altitude.
Most Unique Architecture [10]: No matter what your religion, the Great Stupa of Dharmakaya [10] shrine is intriguing and worth the hike.
Links:
[1] http://www.moon.com/destinations/denver/excursions-denver/boulder/sights/chautauqua-park
[2] http://www.moon.com/destinations/denver/excursions-denver/boulder/sights/national-center-atmospheric-research
[3] http://www.moon.com/destinations/denver/excursions-denver/central-city-and-blackhawk/sights/central-city-opera-house
[4] http://www.moon.com/destinations/denver/excursions-denver/rocky-mountain-national-park/recreation/hikes
[5] http://www.moon.com/destinations/denver/excursions-denver/colorado-springs/sights/garden-the-gods
[6] http://www.moon.com/destinations/denver/excursions-denver/manitou-springs/sights/mineral-springs
[7] http://www.moon.com/destinations/denver/excursions-denver/winter-park-ski-resort/sights/ski-train
[8] http://www.moon.com/destinations/denver/excursions-denver/winter-park-ski-resort/sights/devil-s-thumb-ranch
[9] http://www.moon.com/destinations/denver/excursions-denver/vail/sights/betty-ford-alpine-gardens
[10] http://www.moon.com/destinations/denver/excursions-denver/the-shambhala-mountain-center/sights/great-stupa-dharmakaya