You need an embassy visa for Bolivia if you have a South Korean passport
Visa options for Bolivia
Visitor visa
Travellers need a visa to visit Bolivia for Business or Tourism. A paper or embassy visa is the only visa available for travellers visiting Bolivia. The visa is typically a stamp or sticker added to the passport. Travellers must obtain this visa free of charge from a local embassy, consulate or visa center before travelling. Travellers must complete the visa application form on the Ministry of Foreign Affairs website.