The Washington Post reports 7 places now admitting visitors who’ve been vaccinated against Covid-19. Not every place is welcoming everybody - Americans still can’t get into several of these, for example, and Iceland’s welcome isn’t in effect until May. Precautions are still necessary, too. Of course, policies can change, so this list isn’t definitive.
But it’s a start, vaccines being key:
https://www.washingtonpost.com/travel/2021/02/10/travel-restrictions-vaccine-georgia-europe/