A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
Seamless , tileable CC-0 texture. Created by my own, feel free to use wherever you want!
Source Linolafett
One more from Badhon, sharp horizontal lines making an embossed paper feeling.
Source Badhon Ebrahim
A seamless pattern formed from background pattern 102
Source Firkin
Remixed from a drawing in 'The Canadian horticulturist', 1892
Source Firkin
Alternative colour scheme. Not a pattern for fabrics, but one produced from a jpg of a stack of fabric items that was posted on Pixabay. The tile that this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i.
Source Firkin
No idea what Nistri means, but it’s a crisp little pattern nonetheless.
Source Markus Reiter
A comeback for you: the popular Escheresque, now in black.
Source Patten
Nicely crafted paper pattern, although a bit on the large side (500x593px).
Source Blaq Annabiosis
Submitted as a black pattern, I made it light and a few steps more subtle.
Source Andy
Remixed from a drawing in 'The March of Loyalty', Letitia MacClintock, 1884.
Source Firkin
Here's a new background image for websites with a seamless pink texture. It should look beautiful with website themes where light pink background is needed. The background is seamless, therefore it should be used as a tiled background.
Source V. Hartikainen
Prismatic Curved Diamond Pattern 8 No Background
Source GDJ
Turn your site into a dragon with this great scale pattern.
Source Alex Parker
Super simple but very nice indeed. Gray with vertical stripes.
Source Merrin Macleod
Made by distorting a simple pattern using the 'sin waves' plugin for Paint.net and vectorising in Vector Magic
Source Firkin
Prismatic Isometric Cube Wireframe Pattern No Background
Source GDJ
Small dots with minor circles spread across to form a nice mosaic.
Source John Burks