Outside the N Seoul Tower you find the fences (and also a couple of 'trees') covered with locks. These locks are known as the 'Locks of Love'. The idea is that lovers buy a lock each, they then lock their locks together (and to the fence), to symbolize their love for each other, that they will stay together.
Many of the locks also have small messages attached to them.
NEFs converted in Capture NX 2
EV-1 and EV0 images blended in Photoshop CS4
Vibrance selectively boosted in Photoshop CS4
Curves adjustment selectively applied in Photoshop CS4 to increase contrast