Freebie - High Res Texture Pack
Here is a free texture pack for you. All these textures where photographed in styria, austria. It is a mixed collection of different kinds, mostly stone and concrede textures. All of these are not seemless and unpolished, so you have to do some work of your own to use them.
Every texture has a resolution of 2592px x 1944px, so they are pretty high res. Download the textures all one by one or just download the whole archive which contains all 12 textures. Textures were taken with a Canon Powershot G5, a bit outdated, but still does a good job.