[Andersen]

Гренландия административно часть Дании, так что не вижу препятствий.

Greenland enjoys self government and has opted out of the EU and it is not a part of the Schengen agreement, so you might actually need a visa for Greenland. I am waiting for answer on the issue from the Danish embassy. 
https://www.nyidanmark.dk/en-us/coming_to_dk/visa/faroe_greenland/the_faroe_islands_and_greenland.htm

[Emblaze]

I think answer will be the same as in Føroyar case (also opted out of the EU), but not so easy to lifehack.

[volotar]

Гренландия административно часть Дании, так что не вижу препятствий.

Greenland enjoys self government and has opted out of the EU and it is not a part of the Schengen agreement, so you might actually need a visa for Greenland. I am waiting for answer on the issue from the Danish embassy.  
https://www.nyidanmark.dk/en-us/coming_to_dk/visa/faroe_greenland/the_faroe_islands_and_greenland.htm

Interesting. And on the other hand:

http://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:42000A0922(08)&from=EN

Article 5

1. The provisions of this Agreement shall not apply to the Faeroe Islands or to Greenland.

2. Taking into account the fact that the Faeroe Islands and Greenland apply the provisions on the movement of persons laid down within the framework of the Nordic Passport Union, persons travelling between the Faeroe Islands or Greenland, of the one part, and the States parties to the 1990 Convention and the Cooperation Agreement with the Republic of Iceland and the Kingdom of Norway, of the other part, shall not be subject to border checks.

If it's still the case, then it will be quite easy visiting Greenland. Which could be however still illegal (unless Dannish embassy confirms otherwise).

[joy]

There is no list of visa free countries to enter Greenland.
If we get access to any of this, it will become clear.

[Andersen]

The answer from the visa section of the Danish embassy in Kyiv reads: "Yes, Ukrainians will need to apply for a visa to Greenland."