Stones that have been attuned to the extreme temperatures of deserts or icy wastes. Such stones are quite valuable to adventurers as they can use them in order to preserve or prepare meals, make extreme environments bearable, and use them in clever devices.
An amulet with magical properties that allows the wearer to read the thoughts of others.
A lantern that when lit, interrupts illusions, magical darkness, reveals the invisible, and might even cause the incorporeal to become vulnerable to physical attacks.
A certain patch of forest is well known for causing anyone who ventures into it to suddenly go blind. Once they leave the area their vision returns. Rumors of treasure hidden within.