The steel slabs of US artist Richard Serra, part of the “East-West/West-East” installation, in the desert about 70 kilometers from Doha, Qatar.

Security guards have lonely time in pick-up trucks keeping a 24-hour watch over one of the world’s most isolated art works by one of its most renowned sculptors in the middle of the Qatari desert.

“On a busy day we can get 100 people,” said one guard watching over the four rusted steel slabs, each more than 14 meters high, making up American Richard Serra’s “East-West/West-East” installation.