Seoul has an extensive and efficient public transportation system that includes subways, buses, and taxis. The subway is the easiest method to navigate the city, as it is fast, cheap, and has signage and announcements in English. 

Popular attractions in Seoul include Gyeongbokgung Palace, Bukchon Hanok Village, Myeongdong for shopping, Namsan Seoul Tower for views of the city, and the bustling streets of Hongdae for entertainment and nightlife. 

English is widely understood in major tourist areas, and most signs in public places, including the subway, are also in English. However, it's less commonly spoken by locals in rural areas. 

In Korea, it is polite to bow slightly when greeting. Remove your shoes when entering someone's home or certain traditional restaurants. It’s also customary to use both hands when receiving or giving something to someone older or in a position of authority. 

Major credit cards are widely accepted in Seoul and other large cities. However, it's a good idea to have some cash on hand for small purchases, especially in rural areas or at small shops and restaurants. 

For emergencies, you can dial 112 for the police and 119 for fire and ambulance services. 

Depending on your nationality, you may need a visa to enter South Korea. Check the current visa requirements and travel advisories for your country before planning your trip. 

Don't miss trying local dishes such as bibimbap (mixed rice), kimchi (fermented vegetables), Korean barbecue, tteokbokki (spicy rice cakes), and Korean fried chicken.