Seoul
    Changdeokung Palace Complex - UNESCO site
        - oldest of Seoul's royal palaces
​    Gyeongbokgung Palace

    Lotte World - large indoor theme park

    Cheonggyecheon Stream
                   http://www.sisul.or.kr/grobal/cheonggye/eng/WebContent/index.html
    Bukchon Hanok Village
        - traditional villages

    NANTA Show  - non verbal comedy show, 2 locations in Seoul

    N Seoul Tower

    Korean War Memorial
          9:00 - 18:00, closed Mondays 
    Trickeye museum
           9a-9P

    Baseball - Jamisil Stadium    
            http://ticket.interpark.com/Global/Index.asp?Kind=01007
            http://www.homeplate.kr/ticket-guide/faq

   Shopping
       Hongdae  - http://english.visitkorea.or.kr/enu/ATR/SI_EN_3_1_1_1.jsp?cid=1326972
       Coex
       Insa-dong
       Gwangjang Traditional Food Market
       Myeong-dong Shopping District
    Food
        Noryangjin Seafood Market

        http://tasteofthemoon.com/wolhyang/wolmenu_e.jsp
       
        Goose Island

DMZ
      www.dmztours.com
      www.seoulcitytour.net/English/eng_menu_02_02.html

​Tour Companies
       ​This is Korea - https://thisiskoreatours.com/photos-private-tours-in-korea/

Transfer to and From Airport - 
Korean Airlines Limousine Bus  
Arex train  http://www.theseoulguide.com/arrival/airport-railroad/all-stop-train/

Minsok Korean folk village
   http://www.koreanfolk.co.kr/multi/english/
Suwon
    Hwaseong Fortress - UNESCO site - http://english.swcf.or.kr​
        subway line 1

http://english.visitkorea.or.kr/enu/index.kto

Frommer's 10 Favorite Moments in Seoul
1)Sip Tea in Insadong
2)Stroll the Grounds of Changdeokgung and Biwon
3)Catch the Sunset from atop Namsan
4)Haggle in a Traditional Market Haggle in a Traditional Market - Namdaemun Shijang or Gwangjang Shijang
5)Browse Contemporary Art in Samcheong-Dong  galleries and tiny boutiques
6)Take a Night Cruise Along the Han River
7)Soak in a Traditional Bathhouse - Twenty-four-hour jjimjilbang can be found inevery neighborhood, and modern    
    spas and massage facilities, like the Dragon Hill Spa, are available in Yongsan, Gangnam
8)Eat Fresh Catch at the Noryangjin Market
9)Shop the Dongdaemun Night Market - Doota department store 
10)Enjoy the View from Palgakjeong on Bugaksan - Serious hikers will make their way up Bugaksan's steep slopes to see the old fortress walls and the city from Palgakjeong

Conde Nast