AIO is housed in the vintage 1931 Dunham Schoolhouse, built by John D. Rockefeller as a gift to the village of Seal Harbor. A classic American red brick schoolhouse, the building has been carefully restored and updated to offer clean and comfortable accommodations. Three of the large classrooms have been converted into open dormitories and students sleep on bunk beds. The schoolhouse also includes a lecture hall, recreation room, a research wet laboratory, library, director's office, nurse's office, dining room, bathrooms, and showers.