Free guided tours are available to groups containing at least 10 visitors. Maximum tour capacity is 40 visitors. Tour group size cannot exceed 40 visitors. Guided tours are only available with an advanced reservation via the forms below. Submit a Request Requests must be submitted at least two weeks prior to first desired date. For further information please contact a tour coordinator at 770-206-1557. Click here to submit a request for a group. Click here to submit a request for a school.