1, Berry College, covering an area of 1 10 square kilometers, located in Georgia, was founded in 1902, and can award bachelor's and master's degrees;

2. Harvard University, with a main campus of 2 square kilometers and a total area of 20 square kilometers including forests, is located in Cambridge, Boston, Massachusetts, USA, and is a world-renowned private research university;

3. Stanford University, covering an area of 33 square kilometers, is located in Palo Alto, southern San Francisco Bay Area, California, USA. It is a world-famous private research university;

4. Duke University, covering an area of 34 square kilometers, located in Durham, North Carolina, USA, is a world-class research university;

5. Pennsylvania State University, with a main campus of 28 square kilometers and an expanded main campus of 35 square kilometers, with a total area of 74 square kilometers;

6. The University of California, Davis, which covers an area of 2 1 km2 and is located in the west of Sacramento, is a world-class research university;

7. Ohio State University, with a main campus of 8 square kilometers and a total area of 65 square kilometers;

8. University of Illinois at Urbana-Champaign, with a main campus of 7 square kilometers and a total area of 18 square kilometers of cornfield.