The Fang (frozen waterfall)
The Fang is a 165 foot tall waterfall in Eagle County near the town of Vail, Colorado. It lies in what is called the "Rigid Designator Amphitheatre", which is a significant location in North America for ice climbing and mixed climbing. Type
The Fang is a frozen waterfall and a plunge waterfall. Even when it is frozen, it will not change its shape. The reason why it is such a popular attraction for ice climbing is that very few waterfalls of this type freeze. Normal plunge waterfalls have fast plunge speeds, which makes it hard for it to freeze. Ice climbing
The Fang gets its popularity mainly during winter months when the waterfall freezes into a 26-foot wide, 165-foot tall thick ice pole. Ice climbers enjoy climbing the feature called The Fang and has an ice climbing grade of WI5, which is a level for expert ice climbers with advanced equipment. References

Waterfalls of Colorado
Landforms of Eagle County, Colorado
Ice climbing routes