Pärnu 's a city in southwestern Estonia on the coast of Pärnu Bay, an inlet of the Gulf of Riga in the Baltic Sea. It's a popular summer vacation resort with many hotels, restaurants, and large beaches. The Pärnu River flows through the city. The city's served by Pärnu Airport. The city's occasionally referred to as Pyarnu, an incorrect reverse-transliteration from Russian Пярну. History (Perona, German Alt-Pernau or Estonian Vana-Pärnu)… (More on Pernau)