A topographic map like this has actually been requested a few times, so here you go!
Source Sam Feyaerts
A seamless design of flowers remixed from a jpg on Pixabay by Prawny.
Source Firkin
Prismatic Geometric Tessellation Pattern No Background
Source GDJ
Inspired by a pattern found in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
A light gray wall or floor (you decide) of concrete.
Source Atle Mo
Prismatic Groovy Concentric Background 2
Source GDJ
Adapted heavily from a JPG that was uploaded to Pixabay by Viscious-Speed.
Source Firkin
Remixed from a JPG that was uploaded to Pixabay by theasad121
Source Firkin
Alternative colour scheme to the original.
Source Firkin
A frame using leaves from an image that was uploaded to Pixabay by mayapujiati
Source Firkin
Prismatic Polka Dots Mark II 2 No Background
Source GDJ
The first pattern on here using opacity. Try it on a site with a colored background, or even using mixed colors.
Source Nathan Spady
The name tells you it has curves. Oh yes, it does!
Source Peter Chon
This was formed by distorting an image of a background on Pixabay.
Source Firkin
Classic vertical lines, in all its subtlety.
Source Cody L
Remixed from a drawing in 'Line and form', Walter Crane, 1914.
Source Firkin
A seamless pattern from a tile made from a jpg on Pixabay. To get the tile select the rectangle in Inkscape and use shift-alt-i.
Source Firkin
Zerro CC tillable texture of stones photographed and made by me. CC0
Source Sojan Janso
Design drawn in Paint.net, vectorised using Vector Magic and finished in Inkscape.
Source Firkin
The name alone is awesome, but so is this sweet dark pattern.
Source Federica Pelzel
I love cream! 50x50px and lovely in all the good ways.
Source Thomas Myrman
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
To get the tile this is based on, select the rectangle in Inkscape and use shift+alt+i.
Source Firkin
Looks a bit like concrete with subtle specks spread around the pattern.
Source Mladjan Antic