A gigantic, secret bunker that Albania's communist regime built underground decades ago to survive a nuclear attack by the Soviet Union or the United States has been opened to the public for the first time.

On Saturday, Prime Minister Edi Rama led visitors, including Western ambassadors, on a tour of the never used 106-room, five-story bunker.

It was built by the late communist dictator Enver Hoxha near Tirana, the capital, in the 1970s to prepare for a possible nuclear attack by "American imperialism or Soviet social-imperialism."

Hoxha died in 1985. The communist regime was toppled in 1990.

Rama said the bunker was opened ahead of Albania's World War II liberation day this month. The government plans to use it as a tourist attraction and an exhibition space for artists.