Countries with Open Borders

Some international borders have no checkpoints as a result of an agreement between the countries. For each open border agreement, can you name all the countries in the group?
Only includes countries that can be legally travelled between without going through an immigration/passport control checkpoint.
Does not include de-facto open borders.
For one of these agreements, the border is only open to citizens of those countries.
Quiz by zxcvbnm
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Last updated: March 17, 2020
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First submittedMarch 16, 2020
Times taken28
Average score76.5%
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Schengen Agreement
Austria
Belgium
Czech Republic
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Iceland
Italy
Latvia
Liechtenstein
Lithuania
Luxembourg
Malta
Netherlands
Norway
Poland
Portugal
Slovakia
Slovenia
Spain
Sweden
Switzerland
Union State
Belarus
Russia
CA4
El Salvador
Guatemala
Honduras
Nicaragua
Common Travel Area
Ireland
United Kingdom
+3
Level 55
Mar 17, 2020
Very ironic quiz, given the current political situation atm.