This semi-rare decorative item appears to be a framed treasure map of an unknown mountainous world, complete with landmarks and tunnel routes. This item is found in the Decoration section of inventory. It is two blocks high and four blocks wide and has no collision.
Note that the term "map" is often also used to refer to the in-game minimap, as well as to a world itself (as in, "Wow, this map is so explored already!").
How to Obtain
Loot this item from chests or trade for it on a market world.
How to Use
Use near a globe and some booksheves to create that old-world library feel! Or install it in the captain's quarters of your airship.