This summer, we've been celebrating Colorado and the Mile High City by spotlighting many of the features found on Visit Denver's Denver.org site, including our collection of Denver's top eleven hidden tourism gems and the thirteen best free day trips from Denver. But our latest list, featuring the best free attractions and tours in Denver, is so big -- seventeen items strong -- that we're breaking it into two parts. Start today with selections that'll take you into the top ten, complete with photos, links and Visit Denver text -- and the price is definitely right. Check them out below. Number 17: REI Flagship
Located in the restored 1901 Denver Tramway building, the REI Denver Flagship store is a complete outdoor resource, a historic landmark and an award-winning architectural accomplishment. Don't miss the interactive features, including mountain bike trails, a 45-foot climbing wall and more.
Number 16: Rockmount Ranch Wear
"Browse the racks and enjoy the free museum at Lower Downtown's historic Rockmount Ranch Wear, the originator of the western snap-button shirt. The walls are adorned with photos of the many celebs who have worn Rockmount shirts, including Eric Clapton, Robert Redford and Elvis Presley."
Continue to keep counting down Denver's best free attractions and tours, part one. Number 15: Colorado Sports Hall of Fame Museum
Housed in Sports Authority Field At Mile High (home of the Denver Broncos), this free museum honors the legacies of the Mile High City's greatest sports heroes, and features the Gallery of Legends, a "Great Moments in Colorado Sports" exhibit and a section celebrating the achievements of girls and women in Colorado Sports.
Number 14: Dinosaur Ridge
See some dinos -- or what's left of them anyway. Dinosaur Ridge features famous Jurassic dinosaur bones, such as Stegosaurus and Apatosaurus, discovered in 1877, and Cretaceous dinosaur footprints. A guidebook is available for use on self-guided tours.
Continue to keep counting down Denver's best free attractions and tours, part one. Number 13: Great Divide Brewery Tour
Get a behind-the-scenes look at Denver's craft beer world on a free tour at the Great Divide Brewery in Downtown Denver. Tours take place at 3 p.m. and 4 p.m. Monday - Friday and each hour starting at 2 p.m. to 7 p.m. on Saturday and 12 p.m. to 5 p.m. on Sunday.
Number 12: Celestial Seasonings Tour
See how the largest specialty tea manufacturer in North America blends, packages and ships its teas, then enjoy free samples of every variety they make, and discover a gallery of original artwork from their famous tea boxes.
Continue to keep counting down Denver's best free attractions and tours, part one. Number 11: Coors Brewery Tour
"Taste the Rockies!" The world's largest brewing site still uses the same Rocky Mountain spring water that Adolph Coors discovered in 1873. Free tours show every step in the brewing process, and end with free samples for those over 21.
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Number 10: Tattered Cover Bookstore
The Tattered Cover is one of the nation's largest and most well-known independent bookstores and often hosts free signings by some of the literary world's most famous authors. They also offer free wi-fi if you want to surf the net while you're there. There are three locations: Lower Downtown, East Colfax, and Highlands Ranch.
More from our Things to Do archive: "Photos: Top thirteen best free day trips from Denver."