North Korea says it will dismantle its nuclear test site and hold a "ceremony" later this month.
All of the tunnels at the country's testing ground will be demolished between May 23-25.
According to the country's Foreign Ministry said that the area including observation and research facilities and ground-based units will also be removed.
It says it plans to invite journalists from the US, South Korea, China, Russia and Britain to inspect the process.
Kim Jong-un vowed during the landmark summit with South Korea in April that the country would halt its nuclear operations.
North Korea's Kim Jon Un meets South Korea's President Moon Jae-in
On Friday, the US said could help rebuild North Korea if it agrees to give up nuclear weapons.
Secretary of State Mike Pompeo said on Friday that America would be "prepared to work with North Korea to achieve prosperity on the par with our South Korean friends."
South Korea is one of the world's top 20 economies, after turning towards capitalism at the end of the Korean war in 1953.
His comments come just weeks ahead of Trump's meeting with Kim Jong-un in Singapore. The pair are due to meet on June 12.
