The former Plains High School, where both Jimmy and Rosalynn Carter attended, now serves as the park's visitor center and museum. It features a classroom, principal's office, and auditorium which have been restored to look as they would have when Jimmy Carter attended. There is also an exact replica of Jimmy Carters presidential desk, and his 2002 Nobel Peace Prize. Other rooms feature exhibits that explain the lives of Jimmy and Rosalynn Carter, and a short video focuses on the life of Jimmy Carter according to his friends, neighbors, and family.

The farm where Jimmy lived from age four in 1928 until he left for college in 1941, has been restored to its appearance before electricity was installed in 1938. The current home of the Carters, while not open to the public, is technically a part of the National Historic Site. The Carters have lived in the home since 1961. During his presidency, it was used as his Summer White House.