Mattias Adolfsson is a Swedish artist who created these incredibly detailed pen & ink sketches of surrealist architecture, machines, animals, and spacecraft. The illustrations are so intricate that I often find myself staring at them for long periods of time and discovering new details each time I look. I have a feeling each piece probably takes several days of back-breaking concentration to complete.
Most of the drawings are stand-alone pieces of art, but he has completed work for The New York Times, Work style Magazine, Amtrak, and Wired.
Mattias has a LARGE collection of work, just type his name into google, and you’ll see the whole gamut (or just check his website).
Also, you can find a cool book of some of his illustrations which are printed onto Moleskin HERE.