Final answer:
Estonia is the country that lies across the Gulf of Finland from Finland and features the Gulf of Riga on its shores.
Step-by-step explanation:
The country that is separated from Finland by the Gulf of Finland and has the Gulf of Riga along its shores is Estonia. Estonia is one of the Baltic Republics, which also include Latvia and Lithuania. These nations received their independence from the Soviet Union in 1991 and became members of NATO and the EU in 2004.
The Baltic states transitioned to market economies with democratic governments and have integrated themselves with the global community while maintaining their cultural identities.