A woman looks at a photo of a wall built by the U.S. Army in Baghdad, Iraq, that has been pasted on the longest surviving stretch of the Berlin Wall. Over the past seven years, German photographer Kai Wiedenhofer has documented barriers that divide people around the world. The "Wall on Wall" exhibit opened July 10 and runs through September 13. <a href="index.php?page=&url=http%3A%2F%2Fcnnphotos.blogs.cnn.com%2F2013%2F07%2F17%2Fa-world-divided-by-walls%2F">Visit the CNN Photos blog to view a series of the panoramic images and read the story behind the project.</a>
'Wall on Wall': Exhibit on the Berlin Wall —
A woman looks at a photo of a wall built by the U.S. Army in Baghdad, Iraq, that has been pasted on the longest surviving stretch of the Berlin Wall. Over the past seven years, German photographer Kai Wiedenhofer has documented barriers that divide people around the world. The "Wall on Wall" exhibit opened July 10 and runs through September 13. Visit the CNN Photos blog to view a series of the panoramic images and read the story behind the project.
Adam Berry/Getty Images
People in Berlin pass a photo of a wall built by the Israeli government at the Shu' Fat Refugee Camp in the West Bank. Israel calls the barrier a security fence, while many Palestinians refer to it as the "apartheid wall."
'Wall on Wall': Exhibit on the Berlin Wall —
People in Berlin pass a photo of a wall built by the Israeli government at the Shu' Fat Refugee Camp in the West Bank. Israel calls the barrier a security fence, while many Palestinians refer to it as the "apartheid wall."
Adam Berry/Getty Images
A worker pastes a photo on the Berlin Wall of an observation tower at the demilitarized zone that separates North Korea and South Korea, one of the world's most tense borders. Since 1953, more than 500 South Korean soldiers and 50 Americans have been killed along the DMZ.
'Wall on Wall': Exhibit on the Berlin Wall —
A worker pastes a photo on the Berlin Wall of an observation tower at the demilitarized zone that separates North Korea and South Korea, one of the world's most tense borders. Since 1953, more than 500 South Korean soldiers and 50 Americans have been killed along the DMZ.
Adam Berry/Getty Images
Tourists walk by a photo of the U.S.-Mexico border taken in Calexico, California. Each picture in the exhibit is displayed at 3-meters tall by 9-meters wide, or roughly 10 by 30 feet.
'Wall on Wall': Exhibit on the Berlin Wall —
Tourists walk by a photo of the U.S.-Mexico border taken in Calexico, California. Each picture in the exhibit is displayed at 3-meters tall by 9-meters wide, or roughly 10 by 30 feet.
Adam Berry/Getty Images
A woman takes a photo of an image the photographer captured along the separation barrier in the Palestinian village of Nazlat Issa.
'Wall on Wall': Exhibit on the Berlin Wall —
A woman takes a photo of an image the photographer captured along the separation barrier in the Palestinian village of Nazlat Issa.
Adam Berry/Getty Images
Visitors pass a photo of the border fence in Nogales, Mexico. A U.S. immigration reform bill under consideration in Congress calls for increased security along the border.
'Wall on Wall': Exhibit on the Berlin Wall —
Visitors pass a photo of the border fence in Nogales, Mexico. A U.S. immigration reform bill under consideration in Congress calls for increased security along the border.
Adam Berry/Getty Images
A cyclist walks her bike past a photo of the Belfast "peace lines" in Northern Ireland. The separation wall keeps Catholic and Protestant neighborhoods segregated to minimize intercommunal violence.
'Wall on Wall': Exhibit on the Berlin Wall —
A cyclist walks her bike past a photo of the Belfast "peace lines" in Northern Ireland. The separation wall keeps Catholic and Protestant neighborhoods segregated to minimize intercommunal violence.
Adam Berry/Getty Images
A saxophone player pauses to look at a photo taken of a railway bridge over the Rio Grande between El Paso, Texas, and the Mexican border city of Ciudad Juarez, once known as the deadliest city in the world.
'Wall on Wall': Exhibit on the Berlin Wall —
A saxophone player pauses to look at a photo taken of a railway bridge over the Rio Grande between El Paso, Texas, and the Mexican border city of Ciudad Juarez, once known as the deadliest city in the world.
Adam Berry/Getty Images
A couple passes a photo of a German Democratic Republic guard at the former border between East Germany and West Germany. Kai Wiedenhofer photographed the fall of the Berlin Wall in 1989. At the time, he thought the historic event would mark the end of walls like the one that divided his hometown for 28 years.
'Wall on Wall': Exhibit on the Berlin Wall —
A couple passes a photo of a German Democratic Republic guard at the former border between East Germany and West Germany. Kai Wiedenhofer photographed the fall of the Berlin Wall in 1989. At the time, he thought the historic event would mark the end of walls like the one that divided his hometown for 28 years.
Adam Berry/Getty Images
Wiedenhofer stands in front his picture of a "sunken road" in the West Bank on July 9, the day before the opening of his "Wall on Wall" exhibit.
'Wall on Wall': Exhibit on the Berlin Wall —
Wiedenhofer stands in front his picture of a "sunken road" in the West Bank on July 9, the day before the opening of his "Wall on Wall" exhibit.
JOHANNES EISELE/AFP/Getty Images