A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
As simple and subtle as it gets. But sometimes that’s just what you want.
Source Designova
Clover with background for St. Patrick's Day. Add to a card with a doily, ribbon, a leprechaun or other embellishments.
Source BAJ
A seamless texture traced from an image on opengameart.org shared by Scouser.
Source Firkin
A seamless background colored in pale orange. It has a paper like texture with diagonal grid pattern.
Source V. Hartikainen
From a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
Love the style on this one, very fresh. Diagonal diamond pattern. Get it?
Source INS
Seamless pattern formed from a tile that can be had by selecting the rectangle in Inkscape and using shift-alt-i.
Source Firkin
Remixed from a drawing in 'Maidenhood; or, the Verge of the Stream', Laura Jewry, 1876.
Source Firkin
This ons is quite old school looking. Retro, even. I like it.
Source Arno Declercq
A background pattern with a look of rough fabric.
Source V. Hartikainen
Dark, lines, noise, tactile. You get the drift.
Source Anatoli Nicolae
Remixed from a PNG that was uploaded to Pixabay by k_jprather
Source Firkin
Abstract Ellipses Background Grayscale
Source GDJ
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin