Visitors are silhouetted as they walk inside the artwork "How It Is" by Polish artist Miroslaw Balka at Tate Modern in London October 12, 2009.[Agencies]

LONDON - A giant "black hole" has been created in the cavernous turbine hall of London's Tate Modern museum, in the 10th annual installment of the Unilever Series.

Polish artist Miroslaw Balka has constructed a huge steel container, held aloft on two-meter high supports, which is open at the far end of the space as visitors enter.

They can walk up a ramp into the pitch black space, measuring 13 meters high, 10 meters wide and 30 meters long.

Entitled "How It Is," the sculpture is designed to convey a sense of unease as the visitor walks into the container as if completely blind. The sculpture is on show from October 13 to April 5, 2010. "You can shape this yourself," Balka said of the commission. "The shape you create is not just about your body, it's about your mind."

The title of the installation takes its inspiration from Samuel Beckett's novel "How It Is," about a narrator who looks back on his life as he crawls through mud.

According to Tate Modern, around 22 million people have come to see the nine previous installations.