Lotte World Tower is, well, a super tall tower in Jamsil, Seoul. It has office units and residential apartments, hotel, etc. but it also has a shopping mall and department stores. I frequent Lotte World Mall as I live not too far from there. If you are going to visit Lotte World mall, consider visiting these places.
You can look up the exact locations of these establishments here.
Where to eat
Most of the restaurants are on 5th and 6th floor. You can just go up there and choose whichever one intrigues you! But these are the places I like to eat at.
Ganga is an Indian restaurant on 6th floor. Every one of their vegetable curry is delicious, and they serve good beverages.
Bills is on the first floor unlike other restaurants. The best way I can describe Bills is Sex and the City brunch, but they serve all day. I really like the food. It’s popular so the waiting is looong, but it is well worth the wait. I especially recommend it if you want that Instagram aesthetic brunch.