The MPNHP preserves and interprets the nationally significant historic sites, stories, and legacies associated with the top-secret race to develop an atomic weapon during World War II.

MPNHP is the only national park managed in partnership by the Department of Energy and the National Park Service and includes locations in each of the three secret cities created for the Manhattan Project: Hanford, Washington; Los Alamos, New Mexico; and Oak Ridge, Tennessee. Together, these three sites share the complex story of one of the most profound historical events of the 20th century.

In the Tri-Cities, the Hanford site of the MPNHP includes the B Reactor National Historic Landmark, the first full scale plutonium production reactor in the world.

The Hanford site also includes the pre-war Hanford High School, Bruggemann’s Agricultural Warehouse, White Bluffs Bank, and Hanford Irrigation District Pump House, which together provide perspective on the sacrifices made for the Manhattan Project.

CPCCo Planetarium

The CPCCo Planetarium at CBC provides life-like, high-definition images and sound using the most state-of-the-art projection system in…

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REACH Museum

The REACH Museum is a visitor and interpretive center as well as an outdoor performing arts amphitheater; developed to celebrate the stories of the Mid-Columbia. Travel way back in time, looking through the lens of the Columbia River; learn about Ice Age Floods, Irrigation and Agriculture, The Manhattan Project and our area’s rich history. Children and adults alike will learn a lot from these exhibits. visitthereach.org

Travel to Tri-Cities to see science vacation attractions you’ll never forget — it’s the perfect idea for weekend getaways with the kids.

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LIGO Hanford Observatory

The Laser Interferometer Gravitational-wave Observatory (LIGO) seeks to open a new window on the universe using the world’s largest gravitational wave detectors. Cutting-edge science and engineering fuel the Observatory’s quest to measure the faint ripples of gravitational waves from outer space. LIGO Hanford Observatory offers free-admission facility tours on the second Saturday of each month at 1:30 pm and 3:30 pm. www.ligo.caltech.edu/WA It's quite a trip.

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Explore the Beauty of the Ice Age Floods from the Air

During the last ice age some18,000 years ago, a towering mass of water and ice swept across parts…

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Coyote Canyon Mammoth Site

The Coyote Canyon Mammoth Site is an Ice Age paleontological excavation south of Kennewick. The dig is managed by MCBONES Research Center Foundation, an all-volunteer educational non-profit organization. Public tours are offered once a month April through October. Tour reservations are required.

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Robert and Elisabeth Moore Observatory

Come see stars with us! At CBC, you can explore the vast wonders the sky has to offer…

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East Benton County Historical Museum

Located facing Kennewick's oldest park, Keewaydin Park, you will find on the museum grounds ancient Native American petroglyphs…

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Pasco Aviation Museum

Visit the Pasco Aviation Museum to learn about the history of aviation in the Tri-Cities.

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Explore the USS Triton Sail

Take time to visit a real live submarine sail. The USS Triton Sail can be found at the…

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Kidding Around with STEM Itineraries in the Tri-Cities Learn More
Tri-Cities: Fun (and affordable) Getaway for all! Learn More