The first civilization in Korea was centred on the state of Choson which developed in the northwest corner of the peninsula in the second century BC.Korea is a mountainous peninsula, which boasts breathtaking mountain scenery and a ruggedly scenic coastline. Seoul’s many attractions and excellent transport links make it the country's number one destination for foreign visitors and the logical place from which to embark on a tour of the country. The country also has several dozen national and provincial parks, renowned for their natural beauty and numerous temples. Korea has a significant number of Christians (26%) and Buddhists (26%). Some 46% of the country profess to follow no particular religion. The largest city is the capital Seoul. With nearly four million people, Busan is South Korea's second largest city and the country's largest seaport. This gives the city an international flair, with sailors from around the world trooping through and, these days, not a few tourists (mostly from China, Japan and Russia) too.