If you're going to include Denmark because of Greenland, which is an autonomous territory, you should definitely include the Netherlands, which has three special municipalities in the Caribbean: Saba, Bonaire, and St. Eustatius, all of which are considered integral parts of the Netherlands, much like French Guiana, Guadelope, Martinique, Reunion, and Mayotte are to France.
France is also in North America, not only because of the Caribbean territories above, but because of St.-Pierre and Miquelon, off the coast of Newfoundland.
More, after I hit "submit": France is also in Oceania (French Polynesia and New Caledonia), in Africa (Réunion and Mayotte). The UK is also in many places, including Oceania (Pitcairn), North America (the British Virgin Islands, Anguilla, the Cayman Islands) and South America (the Falkland Islands, but don't ask any Argentines about it).
Iceland itself is located just at the border of American and Eurasian tectonic plate, making it divided into two different continent by a ridge. Indonesia is mainly in asia, but also consists of part of new guinea, which is located inside the oceania, making it the only asia-oceania transcontinental country.
I'm looking at the amount of comments on new additions and wondering if maybe we should make another one since he stopped responding? I'm going to try anyway
Japan (with Bonin Islands and more) Asia + Oceania
yemen (with Socotra island) Asia + Africa
Indonesia (with New Guinea, not the country, the island) -> Asia + Oceania
Panama (because of the panama canal) -> Americas
Colombia, Venezuela, trinidad (because of many caraebenn islands, claim and owned) -> americas
France (with Wallis and Futuna, French Polynesia, new Caledonia, FSAL, Reunion, Mayotte, Guadeloupe, french guiana, Clipperton, Martinique, St Barthélémy, St -Martin, St Pierre and Miquelon) -> Europe + Americas + Africa + Oceania + Antarctica
UK (all theirs dominions and overseas territories)-> Everywhere (but some brits are againts that)
It is because Azerbaijan westernmost point actually is not connected to Azerbaijan and Georgia is farther west than the rest of the Caucasian countries, and since Armenia is the smallest, it does not cross the transcontinental line. Azerbaijan wouldn't either, if it didn't own Nagorno-Karabakh.
Yemen should be added given the Socotra archipelago is geographically part of Africa and Colombia too given the islands of San Andres and Providencia are in North America.
My only complaint is that Indonesia isn't on here. The island of New Guinea is a part of Oceania, and the island is split between Papua New Guinea and Indonesia, therefore making Indonesia transcontinential
Japan (with Bonin Islands and more) Asia + Oceania
yemen (with Socotra island) Asia + Africa
Indonesia (with New Guinea, not the country, the island) -> Asia + Oceania
Panama (because of the panama canal) -> Americas
Colombia, Venezuela, trinidad (because of many caraebenn islands, claim and owned) -> americas
France (with Wallis and Futuna, French Polynesia, new Caledonia, FSAL, Reunion, Mayotte, Guadeloupe, french guiana, Clipperton, Martinique, St Barthélémy, St -Martin, St Pierre and Miquelon) -> Europe + Americas + Africa + Oceania + Antarctica
UK (all theirs dominions and overseas territories)-> Everywhere (but some brits are againts that)
And more