Unique sculpture - Vertical kilometer (10 photos)

The work of American sculptor Walter De Maria is very unique and distinctive.
In 1977, on an area of ​​Frederick in the German city of Kassel was set rig.
For 79 days, she drilled a well depth of one kilometer ...



 
Then lowered into the hole brass rod diameter of 5 cm and a length of 1 kilometer



And all this is covered up massive plate with a hole in the center.







Today it looks like this:





Here is the area of ​​Frederick







Source: www.flickr.com , www.atlasobscura.com , ru.wikipedia.org