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- Bryce Canyon National Park, by Ruth Radlauer ; photos. by Ed and Ruth Radlauer, design and map by Rolf Zillmer
- Mammoth Cave National Park, by Ruth Radlauer ; photos. by Ed Radlauer ; design and map by Rolf Zillmer
- Everglades National Park, by Ruth Radlauer ; design and photos. by Rolf Zillmer
- Zion National Park, by Ruth Radlauer ; photos. by Ed and Ruth Radlauer ; design and map by Rolf Zillmer
- Yosemite National Park, by Ruth Radlauer ; design and photos. by Rolf Zillmer
- Olympic National Park, by Ruth Radlauer ; design and photographs by Rolf Zillmer
- Grand Canyon National Park, by Ruth Radlauer ; design and photographs by Rolf Zillmer
- Great Smoky Mountains National Park, by Ruth Radlauer ; design and photos. by Rolf Zillmer
- Yellowstone National Park, by Ruth Radlauer ; design and photos. by Rolf Zillmer