- National Parks Service Homepage
- US Forest Service Homepage
- Michigan State Forest Information
- Canadian National Parks
- Ontario Provincial Parks
- Backcountry Home Page
- Commercial Caves in the United States
- Dogsledding Tours
- Lonely Planet
- City.Net
- "Roughing it" Travel Guides
- "Outside" magazine
- Realtime airflight monitoring
- Map of preserved land in the continental United States
