Where can I purchase natural looking playground equipment or find plans to build my own?

Question:My daughter would like a jungle gym type thing in our backyard. However we live in a state park on a lake and everything in our yard is natural, stone, driftwood and so forth and we would like to stick with the current theme. Once I attended Scout camp and they had this rope bridge that had three ropes, two to hold with your hands and one to walk across, it was challenging but fun and if I used the right rope I could make it work. Any help would be greatly appreciated.

Answers:
Rainbow Play systems are the best but may not be exactly what you are looking for. Lowe's or Menards has designs