There was a lot of discussion of the US border during Wednesday night's final presidential debate. While Republican nominee Donald Trump reiterated his plans to build a wall between the border of the US and Mexico, stating, "We have no country if we have no border," Hillary Clinton pressed back with her own plans for immigration reform.
History, politics, and demographics have helped to shape the international borders that separate countries around the world.
Here, we've collected 24 photos of what borders between various countries across the world actually look like — from walls, to rivers, to barbed wire fences, to simple road markings.
Talia Avakian contributed reporting on a previous version of this article.
This NASA satellite image depicts the border between Haiti, which is much more arid, on the left, and the Dominican Republic, which is greener, on the right.
This photo of the border between Israel and Egypt was taken by the International Space Station. The border is said to be one of the few that is so visible from space.
The Bering Strait separates the Seward Peninsula of Alaska to the east and Chukotskiy Poluostrov of Siberia to the west. The boundary between the US and Russia lies between the Big and Little Diomede Islands, visible in the middle of the photo here.
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