Another Scottish entry on our list is located in the Highlands town of Kinlochleven. This venue has a 50-foot indoor ice wall made of over 500 tons of snow and ice. The structure has several route possibilities, from severe overhangs to gentler slopes for novices who are just learning to use crampons and picks. The ice is made by following the natural freeze-thaw cycle that takes place when such ice walls are formed outdoors, so the conditions are as close to natural as possible. Instructors are on hand to help new climbers become familiar with equipment and techniques of this climbing niche.