Your sense for stonework is uncanny.
Prerequisites
Dwarf, Wisdom 13, stonecunning racial ability.
Benefit
Your racial bonus to skill checks from your stonecunning ability improves by +2. This stacks with similar improvements to that ability. In addition, the range at which you notice unusual stonework increases by 5 feet.
Special
Stonecunning normally provides a +2 racial bonus on all Perception and Profession checks related to stone or metal. Additionally, a creature with stonecunning who passes within 10 feet of unusual stonework, such as traps and hidden doors located in stone walls or floors, receives a Perception check to notice the feature whether or not he is actively looking.