The Esther Underwood Johnson Nature Center is a modern example of green architecture, utilizing passive solar heating, composting toilets, and gray water planter beds.
Exhibits display local plants and animals.
Two 600-gallon aquariums allow you to see the underwater worlds of the salt marsh and the tidal flats. Glass cases highlight various features of Cape Cod natural history. The gift shop specializes in natural history books for adults and children. Other items for sale include note cards, posters, photographs of local birds, jewelry, toys, and tools for exploring the natural world such as observation jars and hand lenses. Dedicated volunteers maintain a butterfly garden just outside the front doors of the nature center.