How deep is your crack?

So far, since the installation of "The crack", 3 people have fallen into it, there were no hospitalizations, but none-the-less emergency staff were called to tend for the people falling into the "crack".

The crack in a concrete floor – said to symbolise racism and the gulf between white Europeans and the rest of humanity – has been unveiled as the central exhibit at London's Tate Modern gallery.

Shibboleth, by Colombian sculptor Doris Salcedo, runs the full 167-metre length of the massive Turbine Hall at the famous gallery on the south bank of the River Thames.

It starts as a hairline crack then widens and deepens as it zig-zags across the room. Salcedo told reporters it took more than one year to make and she spent the last five weeks installing it.

"What is important is the meaning of the piece. The making of it is not important," she added. Asked how deep the fissure goes, she replied: "It's bottomless. It's as deep as humanity."