Yuma, Arizona, the United States

(These were all taken from within México.) Yuma is a city in Arizona that borders the northernmost point of México in Los Algodones. The city itself is not on the border and I don't think there's a border crossing here. It's only separated by the Colorado River, however, so technically it's very easy to get over there. Google kept saying I was in the US already. There's also the Morelos dam that spreads across the border. It's not possible to walk on it.