Image courtesy Ojai Valley Inn & Spa.

3. Ojai Valley Inn & Spa, California

The property: Covering 220-acres, this historic property is known for it’s celebrity guests as much as its 18-hole golf course.

Eco-friendly highlights: A Herb Garden Pool was recently added to help with energy efficiency, like dual flush toilets, occupancy sensors and solatube lighting to help reduce then need for electrical lighting during the day. In the restaurants, the produce and herbs come right from the inn’s gardens, while other ingredients are sourced from local farmers and ranchers.