Ceci Cela is a Belgian cafe located right across the road from the Hermes flagship store near Dosan Park. I think that's the easiest way to pinpoint the location because it was quite a walk from the nearest subway station. Anyhow, I made my way over through the stinking heat (it's HOT in Seoul right now) to try their famous carrot cake and boy, it didn't disappoint. I had a really hard time finishing since the slice was just massive.