Citizens of visa free countries are allowed to tour or visit Korea without a visa and to stay in the country for up to 30 days (or 90days).
You can find out if you need a VISA or not from “Korea VISA Portal” website.
Korea Visa Portal
ElectricityThe electricity supply commonly used in Korea is the 220-volt 60Hz system. Because most newly built hotels and houses have the 220-volt wiring installed, you are advised to check your electronic equipment beforehand.
ClimateThe average annual temperatures of SEOUL are reported to be 14.2℃ - 16.4℃ of October's average temperatures.
The Korean local currency is the Won. Major foreign currencies that can be exchanged at banks, hotels, and the airport include the US Dollar, Japanese Yen, Euro, and UK Sterling. Most hotels, restaurants, and shops accept major international credit cards including Visa, American Express, Diners, Master Card, JBC and Union Pay. Foreign-issued ATM cards may have limited use.
Today's Exchange Rate
ATM (Automated Teller Machines)Travelers who carry internationally recognized credit cards can get a cash advance in Korea Won from Automated Teller Machines (ATMs) installed at airports, major hotels, department stores, subway stations and tourist attractions. ATMs are in operation 24 hours a day. Most large stores, hotels and restaurants in Korea accept major international credit cards. However it is advisable to carry some cash, since many smaller establishments and stores are unlikely to accept credit cards.