The nation's most polluted nuclear weapons production site is now its newest national park.
Thousands of people are expected next year to tour the Hanford Nuclear Reservation, home of the world's first full-sized nuclear reactor, near Richland, about 200 miles east of Seattle in south-central Washington.
They won't be allowed anywhere near the nation's largest collection of toxic radioactive waste.
"Everything is clean and perfectly safe," said Colleen French, the U.S. Department of Energy's program manager for the Hanford park. "Any radioactive materials are miles away."
The Manhattan Project National Historic Park, signed into existence in November, also includes sites at Oak Ridge, Tennessee, and Los Alamos, New Mexico. The Manhattan Project is the name for the U.S. effort to build an atomic bomb during World War II.
At Hanford, the main attractions will be B Reactor - the world's first full-sized reactor - along with the ghost towns of Hanford and White Bluffs, which were evacuated by the government to make room for the Manhattan Project.