Often referred to as "Pearl of the Baltic," this neat city is known for impressive architecture, wide boulevards, and beautiful harbor. Grand Senate Square, dominated by exquisite Tuomio Church and onion domes of Russian Orthodox Uspenski Cathedral, is an example of neo-Classical, Empire-style impressive architecture. Visit the lively harborfront market and Temppeliaukioa Church (Rock Church), which was created in the 60's from man-made and natural materials. Finland’s musical heritage comes alive in great Finlandia Hall, designed by renowned architect Alvar Aalto. Finland’s beloved composer, Jean Sibelius, is remembered by a beautiful monument on Helsinki’s outskirts. Helsinki has good museums displaying everything from art to architectural design. Open-air Museum - the small wooded island of Seurasaari - has a collection of vernacular buildings assembled from all over Finland which provide insight into how country folk lived until recently. Suomenlinna Fortress is the largest in the world and often called Gibraltar of the North.