162 Boylston St, Boston
Steinert Hall is an underground concert hall found in Boston, Massachusetts. Nicknamed "The Little Gem," Steinert Hall was originally built in 1986. During its heyday, the hall featured musicians such as Russian pianist Sergei Rachmaninoff, along with former prime minister of Poland and Polish pianist Ignacy Jan Paderewski. NBC's Today took a tour of Steinert Hall, which has been closed to the public since 1942.
Source: Matterport Website