The Berlin Wall fell 25 years ago Sunday, and the world is taking time to recall one of the great turning points of recent history. The anniversary of its collapse is an opportunity for reflection about how far humanity has come since the days when Germany stood divided, and a visit to a piece of the fallen wall is a great way to establish a physical connection with history.

In the years since the nearly 90-mile-long Berlin Wall was torn down concrete slab by concrete slab, chunks of it have been shipped all over the world. But Americans do not have to travel overseas to view a piece of the Berlin Wall for themselves, as the U.S. has a number of Berlin Wall segments on display in cities from Miami to Seattle.

One tall hunk of the wall's thick cement rests next to the Hudson River in the shadow of the new One World Trade Center in New York City, where it has become a little-known attraction. "I notice it when I pass by here, but I just thought it was a graffiti piece or mural or something," Ronald Milanov, a Manhattanite in the finance industry, said Friday morning. "Never knew that. That's great."

The piece, which Berlin Wall artist Thierry Noir painted on one side with a cartoonish green face, was donated in November 2004 by the city of Berlin to Manhattan's Battery Park City, according to a plastic information guide affixed to the metal fence enclosing the slab.

Liz Rhoderick, an administrative assistant from Brooklyn who works in a nearby office tower, said she appreciates the installation as a historical object. "I always come out to the boardwalk on my lunch. Pretty neat that we have this here in the city," she said Friday. "I think it's really interesting. A little piece of history."

This piece of the Berlin Wall is not exactly a tourist destination, but the World Trade Center site just a stone's throw away is, and visitors to New York sometimes find themselves face-to-face with a relic they may not have expected to see in a neighborhood so full of American historical significance.

"We were just here for the [9/11] memorial and ended up over this way," Brett Lane, an English tourist visiting the city with his wife and daughter, said Friday morning. "Very impressive, I wouldn't have known this was here. Always something new in New York."

Below is a photo gallery of some of the many pieces of the Berlin Wall installed in cities across the United States:

Los Angeles:

Berlin Wall Piece Ten segments of the Berlin Wall, which constitute the longest stretch outside of Berlin, are seen on display in Los Angeles, California September 18, 2014 Photo: REUTERS/Mario Anzuon

Seattle:

Berlin Wall Piece Section of the Berlin Wall and commemorative plaque at Center House at Seattle Center. Photo: Wikimedia Commons / via user: JMK7

Culver City, California:

Berlin Wall Piece A segment of the Berlin Wall, which was painted by French-born, Berlin-based artist Thierry Noir, is pictured at The Wende Museum and Archive of the Cold War in Culver City, California September 18, 2014 Photo: REUTERS/Mario Anzuoni

Fulton, Missouri:

Berlin Wall Piece Winston Churchill Memorial Library at Westminster College in Fulton, Missouri. A segment of the Berlin Wall can be seen in the lower left. Photo: Wikimedia Commons / via user: Rangermike

Los Angeles:

Berlin Wall Piece A segment of the Berlin Wall is seen on the main campus of Loyola Marymount University in Los Angeles, California September 18, 2014. Photo: REUTERS/Mario Anzuoni

New York:

Berlin Wall Piece United Nations Secretary General Kofi Annan (C) receives instructions by Wolfgang Thierse (R), President of Germany's lower house of parliament and Berlin Mayor Klaus Wowereit as the three stand in front of a piece of the Berlin wall outside the U.N. headquarters in New York City, July 12, 2001. Photo: REUTERS

Simi Valley, California:

Berlin Wall Piece A piece of the Berlin Wall, which has been on display at the Ronald Reagan Presidential Library and Museum since 1990, is seen in Simi Valley, California, September 16, 2014. Photo: REUTERS/Lucy Nicholson

Boston:

Berlin Wall Piece Ireland's Prime Minister Enda Kenny pauses in front of a piece of the Berlin Wall as he takes a tour of the John F. Kennedy Presidential Library and Museum in Boston, Massachusetts February 17, 2012. Photo: REUTERS/Jessica Rinaldi

Yorba Linda, California:

Berlin Wall Piece A piece of the Berlin Wall is displayed at the Richard Nixon Presidential Library in Yorba Linda, California September 17, 2014. Photo: REUTERS/Mike Blake

New York:

Berlin Wall Piece A fragment of the Berlin Wall at Ripley's Believe It or Not! Times Square in New York City. Photo: Wikimedia Commons / via user: Dthompsy

Orange, California:

Berlin Wall Piece A piece of the Berlin Wall is seen at Chapman University in Orange, California September 17, 2014. Photo: REUTERS/Mike Blake

New York:

Berlin Wall Piece A piece of the Berlin Wall is seen near the World Financial Center in New York City, Nov. 7, 2014. Photo: International Business Times / Connor Adams Sheets