Busan is Korea's second largest city with the population of 4 million people. It also serves as the country's major port for international cargo, as well as passenger ferries and flights to Japan. The city is famous for its excellent beaches, natural scenery and various tourist sites including impressive temples, fish markets, hot spas, beautiful park with the observation tower. Linked by air, rail and express bus transportation with all parts of the country, Busan can be reached from Seoul in 5 hours by rail or bus or one hour-by air. The city annually hosts the international Fireworks Festival and the Busan International Film Festival, while regularly holing various events at Centum City, the world's largest department store. Other must-see tourist sites include Busan Tower in Yongdusan Park overlooking the whole view of the city, Jagalchi Fish Market, the largest seafood market in Korea.