• In the EU
  • Visible markers/lines

enter image description here

  • 9
    I expect the answer is "any marked Schengen land border" (and, depending on your definition of "country," the border between Northern Ireland and the Republic of Ireland). This photograph appears not to be a selfie. – phoog Feb 9 '16 at 14:30
  • This is too easy, there must be tens of marked three-country points, let alone just two. – RemcoGerlich Feb 9 '16 at 14:52
  • @RemcoGerlich Three-country points seem mostly to be in the middle of rivers, however, and therefore unmarked and more or less inaccessible, with a few being more accessible by virtue of being on the tops of mountains. – phoog Feb 9 '16 at 16:59

Surely almost all adjacent countries allow you to do this

  • between Scotland and England there are flags and signs you can stand next to on most routes enter image description here
  • between Germany and France (pic from http://www.islandvulnerability.org/borders.html#df) enter image description here
  • Between Spain and Gibraltar
  • the list goes on and on, and pictures of many others can be found on that link above.
  • Between Spain and Gibraltar might not be possible. Are you sure that neither side's border officials ban photography? – Peter Taylor Feb 9 '16 at 20:15
  • No photography ban. I have taken various pictures all the way across the runway. – Rory Alsop Feb 9 '16 at 20:18

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