Spencer Tunick, the daring U.S. artist famous for his nude outdoor photography is back in action. Eight hundred men and women in Belgium posed nude for Tunick's latest nude photo installation, reports said.

The nude volunteers posed for Tunick's latest photo installation titled 'Sleeping Beauties' in the grounds of Gaasbeek's Castle in Belgium, located 6 miles south of the capital Brussels.

Tunick has been taking pictures of nudes in unusual locations since 1986. This was the year when he first took nude pictures of people outside Alleyn's School in Dulwich, South London.

It was in 1995, when Tunick started documenting live nudes in public locations seriously, and has gradually built a large portfolio of work around the world.

Start slideshow to view Tunick's unique pieces of photography.

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