- France2
- Grand Canyon National Park, Arizona, United States2
- Indianapolis, Marion County, Indiana, United States2
- Jena, Germany2
- Rome, Italy2
- Santa Clara, Santa Clara County, California, United States2
- Topeka, Shawnee County, Kansas, United States2
- University of Alaska, Alaska, United States2
- Williamstown, Berkshire County, Massachusetts, United States2
- Barcelona, Spain1
- Blue Hill Reservation, Norfolk County, Massachusetts, United States1
- Bonn, Germany1
- Cambridge, England, United Kingdom1
- Coppenhagen, Denmark1
- Delaware, Delaware County, Ohio, United States1
- Denmark1
- Elgin, Cook County, Illinois, United States1
- Geneva, Ontario County, New York, United States1
- Hamburg, Germany1
- Hudson, Summit County, Ohio, United States1