Just came back from Asia! This time I stopped by Seoul - nice city! It was a short trip but I managed to ride their metro a few times and notice some interesting things about the way signage is done.
This sign gives you the distance to the nearest exit in meters:
This one gives you the previous station and the next station (as opposed to the terminal station of that line):
And this one is a 2D map with 3D buildings - a hybrid. I am not sure how I feel about it, but I am intrigued!