Boy Scouting is designed to take place outdoors. It is in the outdoor setting that Scouts share responsibilities and learn to live with one another. It is here that the skills and activities practiced at troop meetings come alive with purpose. Being close to nature helps Boy Scouts gain an appreciation for God's handiwork and humankind's place in it. The outdoors is the laboratory for Boy Scouts to learn ecology and practice conservation of nature's resources.
Doing things outdoors are what Scouting is all about. Putting the "Out" in Scout"! In the course of doing the things Scouts do, a boy cannot help but go into the outdoors. In fact, it's impossible to properly conduct a Scouting program without going outdoors. As much as possible, and as often as possible, Scouts should get out of buildings. They should follow the dirt trails, camp in the woods, swim in the lake, and all of the other things boys have done for millennia.
A Scout program that doesn't include going into the outdoors is not much of a program. It can't be much fun either. Scouting is not school. We don't learn things in Scouting by sitting in a classroom - we learn them by going out and doing them!