Manhattan Project National Historical Park - B Reactor
Science
World's first full-scale plutonium production reactor at Hanford Site — covers nuclear physics, WWII history, and the science of the Manhattan Project.
What families say
This free guided tour is packed with well-preserved original equipment and knowledgeable docents who happily field questions, making it a rich history stop for older kids and teens studying WWII or engineering. Plan ahead: reservations are needed (arrive early if you're hoping for a no-show spot), you'll take a bus out to the site after a short video, and the building runs warm with only limited A/C, so bring snacks and drinks since none are sold there. Reviewers consistently loved it, with one wishing the tour were even longer—just note it's reportedly closing down for about two years, so check current status before planning your visit.
Ages 9–18
ScienceHistorySocial Studies
Washington 99354
Directions →