A freighter trapped in ice is shown in this aerial photo near Whitefish Bay on Lake Superior northwest of Sault Ste. Marie, Ontario April 7, 2015. The biggest ice cover on the Great Lakes in decades is backing up shipments of everything from Canadian grain to U.S. iron and steel in one of North America's most important economic regions. (Photo by Kenneth Armstrong/Reuters)

A monolith placed in the Utah wilderness in November 2020. New clues have surfaced in the disappearance of the gleaming monolith that seemed to melt away as mysteriously as it appeared in the red-rock desert. A Colorado photographer told a TV station in Salt Lake City that he saw four men push over the hollow, stainless steel structure last Friday night. (Photo by Terrance Siemon/AP Photo)

Production begins on the London 2012 victory medals at the Royal Mint on October 27, 2011 in Pontyclun, Wales. A total of 4700 medals will be made, split between the Olympics and Paralympics. Each medal, 85mm in diameter are the heaviest summer Olympic medals made and production will be completed by Spring 2012. (Photo by Michael Steele/Getty Images)

A 70-metre-long Noah's Ark replica constructed of steel and American cedar on March 31, 2005 in Schagen, Netherlands. (Photo by Michel Porro/Getty Images)

Central to The Capture Site on the R103 in the KwaZulu-Natal Midlands – where Nelson Mandela was arrested in 1963 – is a sculptural installation by Johannesburg artist Marco Cianfanelli. When viewed from a distance, the 50 painted laser-cut steel columns form the image of Madiba’s face. Click on the image below for more on The Capture Site.

Aerial view of Christ The Protector Statue at sunrise on April 21, 2021 in Encantado, Brazil. The statue under construction in Encantado, Southern Brazil, will be named Cristo the Protector and will surpass the iconic Christ The Redeemer of Rio de Janeiro by five meters. Made of steel and concrete, it will stand 43 meters including its pedestal, and become the third-tallest statue of Jesus Christ in the world. (Photo by Buda Mendes/Getty Images)

Bogdana, 17, laughs with her boyfriend, Ivan, 19, in Brovary, Ukraine, Sunday, March 20, 2022. Russian forces pushed deeper into Ukraine's besieged and battered port city of Mariupol on Saturday, where heavy fighting shut down a major steel plant and local authorities pleaded for more Western help. (Photo by Vadim Ghirda/AP Photo)

A mechanical horse-dragon made of wood and steel is presented to the public in Nantes, western France on August 26, 2014. This horse-dragon, created by the French artist Francois Delaroziere of “Les Machines de l'île” (The Machines of the Isle), is the hero of the show "Long Ma" which will be presented in Beijing on October 17, 2014 as part of the fiftieth anniversary of the relationship between France and China. (Photo by Jean-Sebastien Evrard/AFP Photo)