Manchester City Climbing Centre, England
One of the criticisms of indoor climbing gyms is that they lack that same kind of scenery that climbers get to enjoy when they reach the top of outdoor routes. That criticism does not really apply to this indoor gym in the English metropolis of Manchester. Built inside a 19th century cathedral complete with stained glass windows and domed ceilings, there is plenty of atmosphere here to accompany your vertical endeavors. With the highest route stretching to just over 60 feet, Manchester does not challenge many of the other walls on our list in terms of height, but the location is most certainly unique and there are no fewer than 75 climbing lines to choose from, so the variety here is impressive.