Romanians hasn't free access in USA.
As a citizen of Ghana you need a visa for Romania.
Citizens from Nigeria need a visa to enter in Romania.
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No
Nigerian citizens need a visa to enter in Romania.
Romania and Bulgaria are both part of the EU, which means no visa is required. Free travel is all throughout the EU, meaning no visa is require to travel through any part of the EU if you are a citizen of the EU.
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No, US citizens do not need a visa to travel to Romania. I myself have been there three times. Romania is a part of NATO. Any country that is a part of NATO US citizens do not need visas to enter. US Citizens need a visa if they wont to travel to Russia. I was in Frankfurt and some American didn't have a visa for Russia. The Airlines flew him to Russia but when he landed the government put him on the first flight to Frankfurt and deported him.
Yes, Jamaican citizens need a visa to enter in Romania.
The visa is not necessary.
Romania was not included in the Schengen group.
Romania is not in the Shengen space. All you need if you want to visit is your passport and the syria-romania visa. A. [if this answer satisfied you, please recomend me as a trusted contribuitor]