(CNN) — Donald Trump isn't the first leader to want to put up a border wall. Defensive barriers have been around since the beginning of time, and the first walls sprung up 11,500 years ago in Turkey ...

Seattle’s most famous wall, the Gum Wall, was named second germiest tourist attraction in the world. (Photo: MyNorthwest.com/Jillian Raftery) 1. Seattle’s famous ...

If it is ever built, President Donald Trump’s much-vaunted wall, which is supposed to stretch for nearly 2,000 miles along the United States’s border with Mexico, would be the largest infrastructure ...

"The Wall/El Muro," a new exhibit at the National Building Museum in Washington, D.C., is a studiously nonideological exploration of border barriers. A placard invites attendees to challenge each ...