Often referred to as wimmelbilderbuch, German for "teeming picture book", these images are similar to the style of the Where's Waldo illustrations. You can stare at some of these for hours and still probably not pick up on all the intricacies. 

Check out these 12 incredible illustrations and feel free to stare at them until your brain slowly melts away. Click on each image for a full sized version so you can really get a sense of just how detailed these are. 

1. Illustration by Jeff Carlisle.

Try and see how many Star Wars characters you can spot. 

^{click image for full size.}

2. AstroZoo by Daniel Spacek

^{click image for full size}

^{3. Pizza Mine by Valeriya Volkova}

^{click image for full size}

4. Let's Go To Colonies by Daniel Spacek

^{click image for full size}

5. Hundreds of Simpsons Characters

^{click image for full size}

Check out more trippy pictures: Trippy Images for you Acid Heads

6. Die Hard Poster by 100% Soft

^{click image for full size}

7. Bouldering Life by James Clapham

^{click image for full size}

8. Sorrys and Thank Yous by Tanmoy Kayesen

^{click image for full size}

More weird photos: 29 Weird Pictures That Will Rot Your Brain

9. Creature Collage by GalaxyMan01

^{click image for full size}

10. All Seasons of Tokyo by IC4DESIGN

^{click image for full size}

11. Superheroes by George Perez

^{click image for full size}

12. Stains and Mold Farm by Daniel Spacek

^{click image for full size}