Upon arrival, our group of adults plus one teen felt we had made a big mistake. The playgrounds are beautiful, and the park is great... but geared toward the younger audience. We lamented not having visited ten years ago.... But then! - we headed to the visitor's center, grabbed $2 tickets for the tour, and were blown away by the history of the Machine Shop and Railroad Museum led to the The Roald Amundsen Pullman Car where we stood in the same space as four of our presidents! I love history, and this was an excellent opportunity at a great price. The Model Railroad Building also blew us away! I'm so glad we stuck around and explored this amazing space!