In 2010, NHN open the doors to its new headquarter building. Signs in the “Green Factory” communicate information by stimulating people’s senses while placing emphasis on health. Staircases: Park Road. Track: eight parks designated as World Heritage sights by UNESCO have been painted on the concrete walls. And the distance, the number of stairs and calories spent are marked on routes to the most frequented places. Parking Lot: Audio Signs – once someone parks their car and opens the door, they are welcomed by the sound of birds chirping. When they go back to the parking lot, they can easily remember the sound they heard and find the floor.