6 Awesome Tunnels In Colorado You Need To Drive Through At Least Once

Everyone knows everything about Colorado’s iconic Eisenhower Tunnel and the history behind this massive structure, but did you know that there are WAY more tunnels in the Centennial State than just the one? From haunted to historic to mysterious, Colorado is chock-full of awesome tunnels, including these 6 that you need to drive through (or visit) at least once:

For even more incredible man-made structures, check out these 10 Of The Most Enchanting Man Made Wonders In Colorado.