Sofia is the most-visited city in Bulgaria attracting millions of tourists each year offering them a unique blend of Communist and European-style architecture, magnificent orthodox churches, picturesque sceneries, mineral water springs and the best ski experience being situated near the Vitosha Mountain. Some of the best sites in Sofia include the St. Alexander Nevsky Cathedral, Hagia Sophia Church, Boyana Church and Sofia Zoo. History buffs should check out the museums in Sofia such as the National Museum of Military History and National Museum of History. Get the best deals in Sofia hotels at otel.com as it offers cheap hotels in Sofia and gives 5% points for each hotel booking.