From Red Rocks, to Pikes Peak, to Rocky Mountain National Park, to the Royal Gorge, to Mesa Verde National Park, to the numerous cultural attractions in the metro and beyond, Colorado has no shortage of top-rated tourist attractions.

But for all the big-name, world-renowned spots that draw thousands of visitors annually, it's two smaller ones in the metro that garner spots on TripAdvisor's Attractions Trend Index.

The index, released Tuesday, reveals the top 25 attractions that have seen the greatest increase in traveler interest this fall, based on year-over-year search activity on the TripAdvisor (Nasdaq: TRIP) website.

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