Texas has interesting rest stops. They're actually some of the better-maintained state rest stops I've ever run across, but their uniqueness lies in this; on the wall of every one I have ever been in, there is a tile mosaic of some place or event historically or culturally important to Texas' history. Examples include (surprise) the Alamo and San Jacento monument as well as (I believe) a long-horn cow. Not having been to *every* rest-stop in Texas I cannot tell you the rest. :)