e.g. in Eastmarch and Noreach there are accumulations of large greenhouses along the road. Everytime I walk or ride along the road next to it some clicking noises are heard, as if doors unlock and open oder close. According to the "next player" display noone is in the zone except me. So what causes those noises?
Perhaps the greenhouses have their door state set to always open and as they load the door animation and sounds are played?
It's probably an NPC turning off or on a light source. Some light sources use a *click* sound when activated, other use a different sound...