|From left: Bradley Harrison Smith, Kara Colarusso, Jacob Firman, Sean Durning, Nicole Caldwell, and Rebekah Kosier install a bouldering wall on Better Farm's Art Barn.|
Bouldering is a branch of rock climbing that involves climbing low rocks and boulders. It is often designed to be extremely challenging; so that while the climber may not go very high, he or she will have to be physically fit and very skilled. Bouldering is usually practiced with a large mat, so that if the climber falls, he or she will not be injured. It is also generally done in pairs, in case an emergency arises.
A bouldering wall is a type of rock-climbing wall designed specifically for the practice of bouldering. Like a conventional climbing wall, a bouldering wall is constructed with a sturdy wooden backing, and is designed to accommodate climbing holds of various shapes and sizes. Indoor and outdoor versions can be found around the world for practice, fitness, and recreation, and it is also possible to build your own bouldering wall. (Info from WiseGeek)
Check out Metolius Climbing for a great tutorial on constructing a bouldering gym at home.