The Baltic States of Estonia, Latvia and Lithuania, are also rich in history and natural wonders, but they offer the added attraction of being largely free of summer’s tourist throngs. Those in the know advise charter clients to book quickly, however, as these long-forgotten countries are sure to be discovered soon. Riga, Latvia’s capital, has been designated as a UNESCO World Heritage Site due to its unparalleled collection of art nouveau buildings. Another must-see city is Tallinn in Estonia, noted for its Medieval Old Town filled with winding cobblestone streets, soaring spires and vibrant markets, all surrounded by a protective wall complete with guard towers. A longer charter itinerary might continue on to Russia and the historic waterfront city of St. Petersburg, home of the world-renowned Hermitage Museum.