Tallinn never fails to amaze visitors with its historical charm. At its heart is the Medieval Old Town, an area of cobblestone streets, gabled houses, churches and squares that developed here from the 13th to the 15th centuries when Tallinn boomed as a key Hanseatic commercial hub. Old Town has long been the main draw for newcomers – in fact it's so unique that UNESCO added it to its World Heritage List in 1997. Other regions of the city reflect different ages, from the romantic, Tsarist-era Kadriorg Park to the unforgettable, early 20th-century wooden house district of Kalamaja. A modern shopping and business district in the city centre completes the tableau, making Tallinn an amazing blend of old and new.