Interpreters conduct many other activities. They design, plan, and implement living history demonstrations. Beck and Cable recognize the close connection between interpreta- tion of history, natural, and culture themes in writing that: the fundamental principles and techniques of effective interpretation do not change with the subject. Heritage interpretation and natural resource interpretation take place in similar settings. Both occur in museums and visitor centers; along trails and roadsides; and at public parks and private tourist centers. Every natural area has a history to interpret and every historical site is linked to a natural resource base that can be fruitfully interpreted.