Estonia is one of the sparsely populated countries with a population 10 times less than those living in Moscow alone. It is quite logical that there are few traffic jams, a lot of air and untouched nature.
In my perception, the center of the capital is always the calling card of the country. And it’s quite pleasant there. Stone architecture and antique restaurants create a medieval atmosphere.
It is noteworthy that Estonians do not like Russians. If you believe Wikipedia, then in 1721 it was part of the Russian Kingdom until the collapse of the Russian Empire, and then returned to the USSR in 1940. It is not entirely clear whether this was voluntary or forced.
Estonia has many waterfalls and springs, but the northern climate adds the typical cold, especially from the Baltic Sea.
I can’t say that I want to go back there again and again. There are a lot of countries in the world and while the list to visit is lengthy, you can limit yourself to a one-time visit.