8. Land Institute, Salina, Kansas

1412 91 miles from the Center of the USA
A well-known and innovative sustainable agriculture research and advocacy organization, headquartered in this suburban-looking house, surrounded by trails and research gardens, outside of Salina Kansas. The Land Institute researches and promotes agricultural methods that reduce soil erosion, decrease dependence on petroleum, natural gas, pesticides and herbicides. Not simply a scientific organization, the guiding principles of the Land Institute originate in the broader realm of culture and society, and from an awareness that many of the historical great societies of the world have fallen due to the failure of their agricultures. Lectures and events are held regularly at the Institute, attracting visitors from all over the country.