The roof of the California Academy of Sciences in San Francisco’s Golden Gate Park, is comprised of two and a half acres of undulating hillocks that help regulate the building’s temperature and filter water runoff. It’s also a habitat for a wide variety of indigenous plants, flowers, butterflies, and birds.

Designed by architect Renzo Piano, the Academy is “the largest public Platinum-rated building in the world (according to LEED standards) and also the world’s greenest museum. To see more, visit calacademy.org.

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